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For tropes and descriptions that apply to Code Lyoko: Evolution, please refer to its character page.

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The Lyoko Warriors

    In General 
https://static.tvtropes.org/pmwiki/pub/images/1344782778_131.jpg
From left to right: Ulrich, Yumi, Odd, Aelita, Jérémie, William and Kiwi

  • Badass Crew: Even when not on Lyoko, Ulrich and Yumi possess advanced martial art skills, Odd is athletic and relatively good at adapting to situations, William has shown both abilities, Jérémie is able to help as much as the others without even fighting, and Aelita has similar smarts to Jérémie and fights at the same time. It's saying something that they fought against XANA's attacks several times and still survived long enough for Aelita to deactivate the towers.
  • Color-Coded Characters:
    • Ulrich: Green (in the real world)/ Yellow (on Lyoko).
    • Odd: Purple.
    • Yumi: Black (in the real world)/ Red (on Lyoko)/ Green (on eyecatch).
    • Jérémie: Blue.
    • Aelita: Pink.
    • William: Black / Grey / Red.
  • Dangerous Forbidden Technique: The Return to the Past becomes more or less this for them once they realize its side effects. Using it allows them to instantly reverse any damage XANA might have done with his attacks (save for actual death, but it does save people who are about to die) and cancel any breach to their secret without having to kill or blackmail witnesses. However, each time they use it gives XANA a permanent boost in power and intelligence. Once they learn about this early in Season 2, they make a strict rule of using it only as a last resort, to the point Ulrich nearly gets fired from the group when he tries to use it for a personal reason. That being said, this only applied when XANA was still confined to Lyoko. Once he's in the network during the second half of the series and thus, no longer connected to the supercomputer, the Return to the Past becomes safe to use.
  • Digital Avatars: The way they go on Lyoko.
  • Fire-Forged Friends: Later on, thanks to Character Development.
  • Hero Secret Service: Odd, Ulrich, Yumi and Jérémie are this to Aelita.
  • Immune to Mind Control: Their multiple travels on Lyoko and fight against monsters have allowed them to build a resistance to the Spectres' XANAfying by the time XANA developed the ability. The only exceptions were Jérémie and William likely due to both having been on Lyoko only once (excluding XANA-William's 2 virtualizations) before being xanafied.
  • Kid Hero: They're still in school.
  • Medium Blending: Traditional animation in the real world, CGI-rendered 3D models in Lyoko.
  • Ordinary High School Students: When not fighting XANA, they are this.
  • Pajama-Clad Hero: On occasion, the Lyoko Warriors rush to the factory in their pajamas (shoes not included).
  • Playing Sick: A regularly used method to escape school when XANA attacks.
  • Powers as Programs: A literal example; the powers are programs.
  • Recruit Teenagers with Attitude: Justified; they weren't "recruited" by adults in the first place, Jérémie (who is himself a teenager) just happened to find the Supercomputer and assembles a bunch of comrades of his age for help because he is afraid adults would want to destroy the Supercomputer or shut it down without leaving him the time to find a way to materialize Aelita. Plus, the one time they try to break the secret and ask adults for help, no-one believes them. However, William was indeed recruited.
  • Ripple Effect-Proof Memory: Courtesy of their memory being registered in the Supercomputer, they are immune to the Return to the Past memory-erasing effects.
  • Stealth Hi/Bye: They frequently pull this kind of exit on any bystander whenever they hear about a XANA attack. Actually Lampshaded by William about Yumi in "Sabotage":
    William: As usual, she couldn't wait to give me the slip...
  • Teens Are Short: All of them are quite short, with the exception of Yumi and William.
  • Teeth-Clenched Teamwork: At their beginning, they had limited loyalty to each others besides keeping the secret and would often argue or be missing (in "Gravity", Ulrich flat-out refuses to help deal with the current attack so he can take part in a soccer match), and once XANA started developing into a Manipulative Bastard, proved rather easy to turn on one another. They get better over the course of the series.
  • To the Batpole!: Reaching the Hacker Cave where the virtual action starts involves skateboarding (except Jérémie and William: the former rides a scooter and the latter travels on foot) through a sewer, rappelling down ropes in an abandoned factory, taking an elevator locked by impressive blast doors... and finally being dematerialized in high-tech scanners with the obligatory Invocation.
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    Ulrich Stern 
https://static.tvtropes.org/pmwiki/pub/images/ulrich_3228.png
Ulrich Stern

"Who's the dork that pushed me into Sissi's arms?"

Voiced by: Marie-Line Landerwijn, (French) Barbara Weber-Scaff (English), Noé Velásquez (Latin American Spanish), Adolfo Moreno (European Spanish), Mayumi Asano (Japanese)

The unofficial hero of the show, and the main favorite of fangirls. He is a quiet and introverted person by nature, quite the opposite of his best friend, Odd. Headstrong and stubborn, he cares for his friends and would do anything for them. Ulrich is more athletic than academic and it shows when you compare his grades to his sports performance. He attracts the attention of many females of the school, but has obvious feelings for Yumi. He manifests in Lyoko as an unarmored samurai, with the ability to "Triplicate" into three of himself, and Super Speed. His katana can deflect XANA's creatures' energy attacks.


  • Abusive Parents: Ulrich's emotionally abusive dad; he seems to only care about his son for his grades, and, if Ulrich's talk is anything to go by, hasn't talked to him for a year. Not to mention his mother who acts as an enabler by sitting by and watching her husband berate their son.
  • Achilles' Heel: He has vertigo, which flares up at rather inconvenient times. This is presumably the reason his vehicle is the only one with a wheel, whereas the other two can fly.
  • Achilles in His Tent: Wound up in the proverbial tent after being kicked off the team briefly in "The Chips are Down", and then again when he was sulking in "Marabounta".
  • Badass Normal: Even in the real world, Ulrich is no slouch with a sword. In the episode "A Bad Turn", he uses a katana dropped by Yumi's father to fight a materialized Krabe, and manages to cut one of its legs off and block several laser bolts, one of which was about to kill Yumi. He also defeated a xanafied Tamiya in "Music to Soothe the Savage Beast" by using a mirror to send Tamiya’s electric charge back at her.
  • Bad "Bad Acting": He terribly plays Romeo in "Laughing Fit".
  • The Big Guy: He is physically the strongest Lyoko Warrior barring William (which is debatable, knowing that X.A.N.A. gave him most of his known powers and that William's original powers were unseen).
  • Big Man on Campus: Considered handsome by almost every girl in Kadic, and a skilled soccer player to boot. Notably, he is not exactly happy with it, as it causes him to have Sissi as a Stalker with a Crush.
  • Book Dumb: He is far from being actually dumb, but his grades are mentioned to be bad in later episodes, especially season 3 (though it's left ambiguous whether he really is bad at school of if he merely lacks time to review due to the time spent fighting XANA; in at least one episode, he manages to focus on his work for a while and actually gets decent grades). This is the major source of his tensed relationship with his father.
  • Bring It: Like Odd, he sometimes does the "bring it" Bruce Lee gesture.
  • By the Power of Grayskull!: Transfer: Ulrich! Scanner: Ulrich! Virtualization!
  • Calling the Old Man Out: In the season 3 finale, his father comes to Kadic to talk to him about his bad grades. At first Ulrich silently submits himself to his criticisms; then his father suggests his friends are the cause of his grades, and Ulrich replies with this trope:
  • Casual Danger Dialog: Not as much as Odd, but when his friend isn't around he feels the need to take his place at making lame jokes.
  • Cannot Spit It Out: He likes Yumi. A lot. But he never manages to articulate that — even in the face of competition.
  • Character Development: Starts from being a big Jerk with a Heart of Gold to becoming more grounded and mature than Yumi in Season 4. He's also the one to mend fences with Sissi in the finale. He doesn't quite get past his rivalry with William however, criticizing him for his Leeroy Jenkins attitude that got him caught by the Scyphozoa despite Odd being much worse in that department.
  • Chick Magnet: Yumi, Sissi, Milly, Émilie, and most fans have all wanted a piece of him at some point or another.
  • Crazy Jealous Guy:
  • Create Your Own Villain: His unwarranted rejection of Sissi after her "betrayal" of him and the group is what sets her off to become the school Alpha Bitch and a thorn in the group's side. He eventually seems to realize this and by Season 4 is nothing but polite to Sissi even when annoyed by her, culminating in him inviting her back into the group as a friend.
  • Deadpan Snarker: Mainly toward Sissi and Odd, but the others also get their part of it.
  • Designated Victim: Not as much as Yumi, but he's often used by Jeremy in his experiments, such as in "Nobody in Particular". Not only that, but he's also, with Yumi, William's most frequent victim (he devirtualized them 7 times each), which doesn't help.
  • Green-Eyed Epiphany: He's been deeply in denial about his feelings towards Yumi since the beginning. This stops immediately when William becomes a legitimate competitor for Yumi's affections.
  • Green-Eyed Monster: Ulrich can be especially jealous when it comes to Yumi.
  • I Just Want to Be Special: His rationale for not wanting to shut down the supercomputer, as he enjoyed being a hero on Lyoko. Given how his father has such a powerful, and detrimental influence on his life, it's hard to argue that his time in Lyoko was a major distraction from it.
  • Interchangeable Asian Cultures: It's stated he likes Japanese culture, which is presumably the reason his Lyoko avatar is a samurai. However, the martial art he officially practises is pencak silat, which is Indonesian. Might be justified in real life, as pencak silat was somewhat of a fad in France and Netherlands around The '90s and the Turn of the Millennium.
  • Jerk with a Heart of Gold: In the prequel, he is much more antisocial, being actively antagonistic toward Yumi just because she beat him in martial arts practice, treating Sissi with disdain especially after a misunderstanding between them which makes her home an Alpha Bitch, acting displeased by Odd now sharing his room, almost denouncing him to Principal Delmas when discovering he brought Kiwi in secret to Kadic, and even later attempting to use Kiwi as a test subject for Jérémie to see if the virtualization process works. Doesn't prevent him from coming to Jérémie's help twice when seeing him in danger, going on Lyoko to rescue Odd without hesitation when he gets virtualized instead of Kiwi and actually showing concern for Aelita's plight. Judging by how he is portrayed in other episodes, it seems like teamwork eventually made him a better person.
  • Just Friends: With Yumi. Even by the end of the show, it's left unclear if their relationship is solved or not.
  • Kick the Dog:
  • Love at First Punch: He first met Yumi as a sparring partner in a martial arts class.
  • Meaningful Name: "Stern" for The Stoic.
  • Mr. Fanservice: In-Universe. He also qualifies out of universe too, as the writers seem to have went out of their way to have him provide Fanservice every now and then.
  • Multiethnic Name: His first name is distinctly German, while his surname may be French, German or Anglo-Saxon without trouble.
  • Sarcastic Devotee: Never misses a chance to snark about Odd's ego and love life, but the two get along like the best of friends.
  • She Is Not My Girlfriend:
    • In regards to Yumi.
    • Even more so to Sissi, but in this case he doesn't really like her that way to begin with.
  • Stalker with a Crush: Tends to lapse into this when Yumi spends time with William, such as when he follows her to the pool in "Marabounta".
  • The Stoic: He does occasionally shows emotion, typically his Unresolved Sexual Tension with Yumi and occasional outburst, but overall he is much calmer than his teammates.
  • Straight Man: To Odd's comic relief.
  • "Well Done, Son!" Guy: A whole Ulrich-centered episode has him constantly seeking approval from his ultra-exigent father. He gets it in the end... at the apparent cost of his father's life. And then promptly has it Reset Button'd. Poor guy.
  • Why Did It Have to Be Snakes?: Ulrich is terrified of heights. This is due to the fact that he suffers from vertigo, a disorder that causes nausea and disorientation and is triggered if the person looks down from a high perch. This disability even extends to his Lyoko avatar.
  • Will They or Won't They?: With Yumi. According to the Series Finale "Echoes", they will... but it was highly tentative.

Lyoko Avatar

  • The Ace:
    • Ulrich is pretty much the strongest Lyoko Warrior for most of the show's run. His katana can one-shot monsters, reflect lasers, block a Megatank's blast and doubles as a thrown weapon. Not only that, but he gets two very versatile Lyoko powers that come with no drawbacks at all.
    • Zigzagged in Season 4. He starts to get overshadowed by Aelita and is usually worfed by William, but even then everyone stares in awe as he singlehandedly curb-stomps XANA's forces in "Hard Luck". Also, there is the fact that he is the one who kills the Kolossus in the penultimate episode.
  • Attack Reflector: His katana can be used to deflect the Monsters' laser.
  • Badass Biker: From Season 2 onwards, thanks to the Overbike.
  • Calling Your Attacks: Less so than Odd, but he will occasionally shout "Impact" when hitting a monster or "Triplicate/Triangulate" when using his power.
  • Car Fu: With the Overbike.
  • Doppelgänger Attack: "Triplicate" allow him to generate two duplicates of himself. In the first season they only act as decoys to distract enemies, but Seasons 2 and 3 has him using them as allies that can attack of their own. He used it only once in Season 4 (in "Double Take"), as William correctly guessed which one was the real Ulrich and devirtualized him.
  • Doppelgänger Spin: "Triangulate" allows him to essentially combine his Super-Sprint and Triplicate, causing him to move at Super-Speed around the opponent in a triangle-like pattern, with the three Ulrich appearing at each angle.
  • Everything's Better with Samurai: There's no real reason for him to be a samurai in Lyoko. He's not even Japanese. But damn, it sure is cool.
  • Fingerless Gloves: On both of his outfits.
  • Katanas Are Just Better: Literally, as his weapon is easily the most effective against most monsters, being capable of causing easy damage to their weak-points and deflecting their lasers.
  • Hoist by His Own Petard: In Skidbladnir, William devirtualizes him by using his own katana against him.
  • Lightning Bruiser: His katana is an efficient weapon both to deflect attacks and inflict heavy damage, while his Super Sprint (and even without it) power makes him the fastest of the group.He becomes the second fastest one in Season 4, as William's Super Smoke surpasses his Super Sprint. However, without special abilities, William remains slower than Ulrich.
  • Me's a Crowd: His Triplicate ability, which allows him to make two copies of himself.
  • Le Parkour: One of the many uses he found for Super Sprint.
  • Samurai: His avatar's design is based on a samurai. In the final season, his appearance is updated and is loosely based on a ninja, though.
  • Speed Echoes: His Triangulate ability allows him to create these. What's more, they're not just afterimages; they're actual copies.
  • Super Speed: "Super Sprint!"
  • Throwing Your Sword Always Works: He's got a better track record throwing his sword than Odd does shooting his arrows.
  • Weapon of Choice: A katana, which is replaced by twin blades during the last season.
  • Wrecked Weapon: His sword can be destroyed by the monsters' lasers if it is hit while Ulrich is not holding it. This is demonstrated in "The Pretender", forcing Ulrich to make an Improvised Weapon out of a broken rock to fight for most of the episode.
  • You Keep Using That Word: Several episodes refer to Ulrich's sword as a "sabre", even though its design is quite blatantly based on a katana.

Season 4 Avatar

  • Awesome, but Impractical: His Triplicate ability is useless against William, who can identify the real Ulrich among the clones through an unknown ability. In fact, Ulrich only used this superpower once in the entirety of the fourth season, while the Super Sprint became his signature Lyoko power.
  • Dual Wielding: His new avatar grants him a second katana.
  • Good Colors, Evil Colors: His new swords have a blue aura when Ulrich wields them, but glow red if touched by William or XANA-Aelita.
  • Hard Light: When "translated" on Earth.
  • Sensual Spandex: An update from his much more loose-fitting older outfit.

    Odd Della Robbia 
https://static.tvtropes.org/pmwiki/pub/images/odd_7278.png
Odd Della Robbia

"That's just the Magical Odd Effect. You see me once and you feel as though you've known me all your life!"

Voiced by: Raphaëlle Lubansu (French), Matthew Géczy (English), Gabriel Ortiz (Latin American Spanish), Jesús Pinillos (European Spanish), Hiroki Shimowada (Japanese)

The only extravert of the Team, and an incorrigible smart-aleck. He dresses in flashy, clashing colors, mostly purple and yellow. Though physically petite compared to the rest of the team, he is an adrenaline junkie, just the type to go for extreme sports. Also a passable student; his strengths are in the languages and artistic classes. He's a big flirt who's dated about every girl in his grade (most of them for only a day or two) as well as a few others. He has smuggled his small dog, "Kiwi", into the dormitories. In Lyoko, his avatar is a Cat Boy version of himself, including claws and a tail. He has heightened agility and stamina in this form, and can shoot "Laser Arrows" from his forearms — which, for a time, tended to run out of ammo at the worst possible moments. This shortage was resolved in Season 2 at the expense of another of Odd's powers, the "Future Flash" which offered spontaneous visions of the mostly immutable immediate future. This left Odd with the short end of the stick powers-wise, a fact lampshaded in Season 3's "Triple Trouble" when Jérémie tries to give Odd a teleportation ability, but ended up making two clones for him instead, and the clones wind up not disappearing when no longer needed. At least he still has a marginally useful energy shield, granted as part of the Season 2 power realignment.


  • Anime Hair: A rare justified example: he is explicitly mentioned to use gel to keep his hair that way (though that doesn't explain the bi-color part). Notably, he originally had a regular hairstyle in the prequel, and changed it according to what he looks like on Lyoko (twice).
  • Big Eater:
    [seeing Odd wolfing down food for the first time]
    Ulrich: You always eat like this?
    Odd: No, it's just I'm not very hungry today.
  • Boisterous Bruiser: In training. He's too young to drink, but he gets the eating, womanizing, battle-happy and fun-loving elements down pat.
  • Book Dumb: He is absolutely terrible at school, and apparently manages to keep decent grades only by cheating and copying Jérémie's notes. However, he is also shown to be quite creative on the artistic side of things, and while he has absolutely zero sense of strategy, he is quite capable of improvising, so he has some smarts.
  • Bring It: He's fond of the "bring it" Bruce Lee gesture.
  • Butt-Monkey: Gets the least respect in his group, does badly in school, has absolutely no luck with his love life, gets picked on by his sisters, and as he lampshades, is "the only one who looks like a nitwit on Lyoko".
  • By the Power of Grayskull!: Transfer: Odd! Scanner: Odd! Virtualization!
  • Camp Straight: He does look a bit effeminate (to the point of leading to Viewer Gender Confusion from some fans), dresses in pink and purple, and speaks in a high-pitched voice. Graphic errors such as the occasional lack of undershirt, or his voice in the French dub, don't help either. Ironically, however, he is clearly shown to not only be straight, but also very interested in girls. Of course, that doesn't stop the Yaoi Fangirls from imagining things...
  • Casual Danger Dialog: Nothing changes Odd's goofy demeanor, not even being faced with certain death.
  • Catchphrase: "T'y crois pas!" ("Can't believe it!")
  • Crazy Enough to Work: Almost everything he does is this. See Leeroy Jenkins.
  • Crouching Moron, Hidden Badass: For all his silly jokes, Butt-Monkey status and tendencies to go crazy in fight, Odd definitely is a skilled fighter. At several points, he has been able to deal with large amount of monsters entirely on his own, escape or distract Xanafied people on Earth and save Aelita. Not to mention he is the one who finally takes down William, allowing the Lyoko Warriors to get him back.
  • Empowered Badass Normal: When Jérémie used a Tower to gives him powers for a short amount of time so he could fight toe-to-toe with a XANA-possessed Yolande.
  • Expository Hairstyle Change: In the prequel.
  • Flanderization: Coupled with Static Character and Took a Level in Jerkass, Odd was always a rather playful character, but in Season 4, his antics start becoming more and more troublesome, which are coupled with a Never My Fault attitude in regards to him screwing up, which again, plays into Static Character below.
  • Insistent Terminology: "I'm not scrawny, I'm svelte."
  • Is It Something You Eat?: Being a Big Eater with a very limited vocabulary, this comes up a lot.
  • Keet: Short, skinny, hyperactive, Camp Straight, he fits this trope like a glove.
  • Kid-anova: He has had relationship with almost every girl in his school, Yumi, Aelita and Sissi excepted (and even then, he once replaced Ulrich as Yumi's partner at dance, flirted with Aelita upon first meeting her, and Sissi gets moments with him several times too).
  • Leeroy Jenkins: He rarely has any strategy before charging; most of his tactics consist either in doing something completely crazy or going ahead shooting at the enemy. Even his own teammates have some doubt about his sanity.
    Aelita: You call this being careful? I call it being COMPLETELY NUTS!
    Odd: Isn't that the same thing?
  • Meaningful Name: Aside from the obviousness, "Odd" may also come from "Odr", meaning "tip of the arrow".
  • Mr. Fanservice: He has his share of fangirls. This is at least partly due to his Lyoko form... and the Sensual Spandex.
  • Multicolored Hair: He has blond hair with a purple spot in the middle of it. This carries over in his Lyoko form.
  • Multiethnic Name: Even more than Ulrich; he sports a North European-sounding first name and an Italian surname.
  • Nausea Fuel: Invoked. He feels nauseous while riding the Transport Orb to sector five. Yumi experiences the same symptoms in the episode where the two swap bodies.
  • Never My Fault:
    • In one episode, he refuses to take the blame for getting himself and Aelita in detention (For context, Odd wanted Aelita to cover for him in gym class... since he spent the whole night up playing a video game).
    • In another, Kiwi gets out of control, much to everyone else's annoyance, and Odd continues to try to make excuses for the dog instead of disciplining him.
    • In yet another, he gives an embarrassing photo of Yumi to the school newspaper, and then convinces Ulrich to take the blame, which leads her to be furious with the latter for most of the episode. Later attempts to explain "Ulrich's" decision to give the photo away leave him to accuse Ulrich of trying to get Yumi's attention because he likes her. Remember: Ulrich is taking the blame to protect Odd's reputation for reasons of friendship.
  • The Nicknamer: He's the one that names all the monsters (even complete with Xtreme Kool Letterz). As if that wasn't enough, two episodes reveal that he also calls some monsters by ordinary human names such as "Lucy-Ann". He's also responsible for Jérémie being called "Einstein" and Aelita "Princess" most of the time. He sometimes calls Ulrich and Yumi "Lovebirds."
  • Outnumbered Sibling: Odd reveals in the episode "Distant Memory" that he has five older sisters who bully him.
  • Screams Like a Little Girl: It's even worse in the original French version, where he actually sounds like a kindergarten girl even without screaming.
  • Shipper on Deck: He is very supportive of Ulrich's relationship with Yumi. To a lesser extent, he's this way with Jérémie and Aelita's relationship as well.
  • Ship Tease: Often with, ironically enough, Sissi.
  • Small Name, Big Ego: As he stated in the aptly-named episode "Bragging Rights".
    Odd: Yes, I'm a braggart, and I love it that way!
  • Static Character: The most noteworthy example on the show; while almost every other character, even XANA had some form of Character Development one way or the other throughout the series, Odd is still pretty much the same kid he was in the prequel.
  • They Wasted a Perfectly Good Sandwich: He hates this trope; he spends the entirety of the episode "Tidal Wave" complaining about not eating.
  • Took a Level in Jerkass: In Season 4, coupled with Flanderization. Highlights include him being extremely cocky in "Bragging Rights" and selling an Embarrassing Old Photo of Yumi to the Kadic News, followed up by trying to get out of facing Yumi's wrath by having Ulrich take the fall in "Cold Sweat". Dies down in "Fight to the Finish" however, where he's shown shedding a tear over Franz Hopper's Heroic Sacrifice.

Lyoko Avatar

  • Alice Allusion: Unintended, but it's undeniable that he's got the whole "Cheshire Cat" thing going.
  • Arch-Enemy: The Megatanks. Lampshaded in the first episode.
  • Badass Normal: After season 1, he lost his Future Flash and became the only member of the team without a special ability. This is actually a plot point in a season 3 episode, where he comes to the realization that the lack of superpowers doesn't make him any less effective than his teammates.
  • Brought Down to Badass: Even after Jérémie erased his Future Flash power, he is still very competent. Of course, the fact his power wasn't of much use to begin with does help.
  • Cat Boy: His Lyoko avatar gives him a set of cat ears and a tail. He also runs on all fours quite frequently.
  • Chest Insignia: Of Kiwi peeing. Even he doesn't get why Lyoko did that.
  • Deflector Shield: Since Season 2 (and in the prequel as a minor continuity goof).
  • Facial Markings: Like Aelita, he has markings above his eyes.
  • Finger Gun: An interesting variation, more akin to a Forearm Shotgun. Although he does not require it to fire, he usually holds his firing arm as if he was pointing a shotgun, and often does a pumping action motion that goes accompanied by a surpising shotgun sound effect.
  • Four-Fingered Hands: He loses a finger when he goes into Lyoko, likely because he becomes a Cat Boy
  • Fragile Speedster: In Season 1. While he has as many Hit Points as anyone else, before Jérémie programs in his shield, he has no defenses except dodging.
  • Homing Projectile: XANA grants him this upgrade, but it's lost in the same episode.
  • Hover Board: His Overboard in Season 2.
  • Instant Cosplay Surprise: Again, in the prequel, he's the most baffled concerning his Lyoko avatar:
    Odd: I don't dream about giant purple cats!
  • Long-Range Fighter: Played with. His signature Laser Arrows definitely enforce this, but his claws can also damage monsters and are often used to subdue XANA's Mantas. He will also not hesitate to straight up punch his opponents if he runs out of ammo (as shown in the episode "Franz Hopper") or if they get too close for comfort ("Bragging Rights").
  • Le Parkour: The undisputed master of it, even beating out Ulrich.
  • Running on All Fours: He gains the ability to run faster on all fours in Lyoko.
  • Seers: Future Flash gives him brief glimpses into the future. He loses the ability in Season 2.
  • Super Reflexes: Cat-like reflexes, essentially. He may not be very tough, but he's damn near impossible to hit.
  • Taking the Bullet: This is usually how he gets dematerialized, mostly because he's so agile that it's hard to hit him unless he wants to be hit.
  • Unskilled, but Strong: His default skillset is smaller or less useful than the rest of Lyoko warriors (being pretty much his arrows and Future Flash), but he surpasses them in agility and physical abilities by a good margin (bar William and Ulrich).
  • Wall Crawl: Using his claws like a cat climbing a tree.
  • Weapon of Choice: Laser Arrows, which are actually darts fired from his forearm.
  • What Kind of Lame Power Is Heart, Anyway?: Future Flash. Not only does this power have very limited scope (Odd is the only one unable to use his power at will, and it's worthless in a fight), but the power activating causes Odd to stop moving for a while, making him an easy target. Lampshaded when Odd mentions Jérémie erased it accidentally and never bothered reprogramming it because he felt it was useless. It's actually suggested that he is more effective without it.
  • Wolverine Claws: The claws of his cat paws can apparently harm XANA monsters to a very minor degree, as he sometimes uses them to spur Mantas while riding them and it causes them visible pain. It's not enough to destroy them however.

Season 4 Avatar

  • Hard Light: When "translated" on Earth.
  • Hoist by His Own Petard: In "Guided Missile", William reflects Odd's laser arrow with his bracelet, devirtualizing him.
  • Made of Iron: Zigzagged. Generally, he's not that resistant and can easily be beaten when he's unable to defend himself. His one defensive technique, the shield is small, fragile and doesn't even protect his legs. However, he's so far the only Lyoko-Warrior who survived a direct hit from William's Sword. Twice.
  • Sensual Spandex: Quite a bit tighter than his previous avatar's outfit.
  • Spam Attack: Thanks to an upgraded ammo count, Odd is much more liberal with his arrows here than in previous seasons. His main strategy against William involves unleashing a Flechette Storm that not even his BFS can block.
  • Unusual Ears: Cat ears (to complete the feline appearance).
  • Worf Had the Flu: Odd's mix of nimble movements and fast projectiles often made him the perfect counter to William's slow and short-ranged attacks. This often forced the writers to come up with contrivances to prevent the two from facing each other in a straight fight. In fact, without anything interrupting them, they fought only three times ("Bragging Rights", "Kadic Bombshell" and "Guided Missile"), which is extremely rare compared to the enormous number of fights William had with the others.

    Yumi Ishiyama 
https://static.tvtropes.org/pmwiki/pub/images/yumi_9774.png
Yumi Ishiyama

"Black is my color. Black, like your eye will be if you don't back off!"

Voiced by: Géraldine Frippiat (French), Mirabelle Kirkland (English), Liliana Barba (Latin American Spanish), Adelaida López (European Spanish), Sayaka Kinoshita (Japanese)

The tallest and oldest of the group, alongside William. A good student, she is a Japanese national at the boarding school, living off-campus with her family. She is one grade above the rest of the Team, which proves sometimes problematic. While she may have feelings for Ulrich, Yumi is exasperated by his inability to articulate his crush. Her virtual form is a geisha with a collapsible razor-edged fan, with which she can deflect energy bolts. The fan is controlled telekinetically, and can be thrown as a ranged weapon, returning to her hand after an attack. Yumi also exhibits telekinetic power over several objects of the Lyoko landscape — most often boulders in the Mountain or Desert sectors. A running joke among fans is XANA's tendency to single her out for attack.


  • Action Girl: Is proficient in martial arts in real life, and a very capable fighter on Lyoko.
  • Anchored Ship: In Season 3, she tells Ulrich that she's not going to be anything more than Just Friends with him while they're fighting on Lyoko, because the mission is too important to complicate with romance.
  • Bare Your Midriff: All of her everyday clothes include this feature; it seems to be very much in fashion at Kadic.
  • Brainy Brunette: She is not as smart as Jérémie or Aelita, but she is still quite intelligent. Whenever Jérémie and Aelita are absent, she usually is the one in charge of using the Supercomputer.
  • By the Power of Grayskull!: Transfer: Yumi! Scanner: Yumi! Virtualization!
  • Catchphrase: In the original French...
  • Celibate Hero: Well, Heroine: Takes this position in Season 3, after deciding that she doesn't want to complicate her working relationship with Ulrich by allowing romance into the equation, and instead resolves to be Just Friends with him until the Lyoko problem is resolved. It doesn't actually change their situation any.
  • Cool Big Sis: She's closer in age to the rest of the group than most examples, but she's mature enough to fit the mold pretty well.
  • Deadpan Snarker: Not as much as Ulrich, but when provoked...
  • Designated Victim: Unlike the other Lyoko Warriors, Yumi lives with her own family off-campus, making her isolated from them, and as such an easy target for XANA's attacks. One could argue her role as the group's Cool Big Sis and the fact she's the most reluctant to keep fighting might help as well, considering XANA's habits to play with people's minds. She's also, with Ulrich, William's most frequent victim (he devirtualized them 7 times each), so it doesn't help.
  • Dude Magnet: For a girl supposedly not as remarkable as Sissi, it's amazing how many guys want her. Apart from Ulrich, William, Théo Gauthier, Johnny...
  • Dying Curse: In "Final Round", she is the last Lyoko warrior to be defeated by a brainwashed William. As her virtual body disintegrates, she tells him how much she regrets agreeing with the idea to make him a member of the team.
  • Everyone Knows Morse: She and Hiroki learned it to talk in secret at the table.
  • Furo Scene: Chances are pretty good that you'll catch Yumi in the bathtub in several given episodes (Though, since most of these are in Season 1, this will be by Stock Footage).
  • Friendless Background: In "XANA Awakens," she is friendless until meeting Ulrich.
  • Green-Eyed Epiphany: She does a pretty decent job of pretending she's not into Ulrich, until someone (usually Sissi) starts flirting with him.
  • He Is Not My Boyfriend:
    • In regards to Ulrich. Yumi has a fairly hilarious scene where she accidentally calls Ulrich her boyfriend in front of Odd and then repeats that Ulrich is her friend as if trying to convince herself of this.
    • She also says this about William, but in this case it is genuine.
  • I Just Want to Be Normal: Out of all the team, she is the one to be the least comfortable with the struggle against XANA, as it forces her to routinely lie to her family (something she hates to do), frequently exposes her to XANA's attacks and generally makes her life more complicated. By the end of the series, she is, excluding William, the only one eager to shut down the Supercomputer and move on. This is averted in her diary: back in the end of Season 1, she clearly states that she will misses Lyoko... but given that she didn't know how long the conflict with XANA would last...
  • I Know Karate: Inverted, as although she never mentions it (nor is seen training like Ulrich), she knows karate and uses it in the prequel to beat Ulrich in a pencak silat spar.
  • Just Friends: With Ulrich. Though the finale hints that the two wil start dating.
  • Laser-Guided Karma: Unfortunately for her, when she makes questionable choices, it often ends up biting her in the ass. Not only that but it often happens when William is around.
    • Had she accepted William in episode 53 "The Secret" instead of "Final Round", they wouldn't have to send him in an emergency mission with Aelita in Sector 5 (by far the most dangerous of all sectors to remind you) without any experience. As a result, William got Xanafied, and Yumi became his favorite victim: she was the Lyoko-Warrior he devirtualized the most (alongside Ulrich).
    • In episode 68 "Opening Act", Yumi, before fighting XANA-William, mocks him, saying that he is still a rookie. Said "rookie" then proceeds to devirtualize her.
    • In "Lost at Sea", Yumi disowns Hiroki for having stolen her diary, essentially leaving her all alone. When the pages of the journal are later torn, she says to Hiroki she'll never forgives him. Later, she ends up alone in the Digital Sea. Needless to say she doesn't like it and regrets not having made amends with Hiroki before she possibly kicks the bucket.
    • When William wanted to help them in the second-to-final episode Yumi (Ulrich and Odd to a lesser extent) violently rejects him and refuses to let him on Lyoko, arguing XANA might seize the opportunity to control him again. Ironically, this is exactly what happens... except XANA is able to control him through a tower because he is still on Earth. When Yumi returns to Earth, the once-again Xanafied William utterly massacres her.
  • Mistaken Nationality: Regularly mistaken for Chinese, much to her irritation.
    Yumi: I. Am. JAPANESE!!
  • Nice Job Breaking It, Hero!: When William requested to join the team for the last battle, Yumi violently rejected him and refuses to let him on Lyoko, arguing XANA might seize the opportunity to control him again. Ironically, this is exactly what happens... except XANA is able to control him through a tower because he is still on Earth and hasn't been virtualized enough times. As if it is some sort of revenge, William then proceeds to gives a No-Holds-Barred Beatdown to Yumi, which in real life would have left her with broken bones, at least.
  • One Head Taller: Not exactly one head, but she's notably taller than Ulrich. She takes from her mother, obviously, who is also taller than her father.
  • One of the Boys: She's the only girl in her group of friends (except Aelita, who's a computer program for most of the show). She also avoids traditionally "girly" pasttimes, preferring soccer, track and field, and martial arts.
  • Raven Hair, Ivory Skin: The palest of her friends, with very black hair to match.
  • "The Reason You Suck" Speech:
    • To William in "The Secret".
      Yumi: Because I find your second-rate Casanova act sickening! In the beginning it was pretty nice but now I'm really fed up! So why don't you buzz off and leave me alone?
    • Not even Ulrich (in "Marabounta") is spared:
      Yumi: Oh yeah, right. What an incredible coincidence! Anyway, do you mind shelving your ego for a minute?
  • Shorttank: She does have some feminity to her, but she is still significantly more tomboyish than either Aelita or Sissi.
  • Tomboy and Girly Girl: Tomboy to Aelita's and Sissi's Girly Girls.
  • Took a Level in Jerkass: Even though she had her moments here and there, (in "Routine", she was angry at Ulrich for... talking to a girl) Yumi is a lot pettier and sensitive in Season 4. Highlights include her being extremely angry with Ulrich in "Lab Rat" for having forgotten about her birthday, disowning Hiroki in "Lost at Sea" for having stolen her diary, believing that Ulrich sold an Embarrassing Old Photo of Yumi to the Kadic News, despite the fact that Ulrich would never do that (granted, he did take the fall from Odd) in "Cold Sweat", and violently rejecting William's help in "Fight to the Finish". It's likely that this stemmed from the stress that battles against XANA had caused her over the series, as noted above in Designated Victim and I Just Want to Be Normal. It is doubtful that anyone can go through such traumatic events without becoming somewhat abrasive. It doesn't explains, however, why she chose to publish an embarrassing photo of Odd and Ulrich in the end of the aforementioned "Cold Sweat". While the former deserved it, the latter certainly did not. She did got better in the end, though: in "Echoes", where the group shuts down the supercomputer, she's more in-line with her Cool Big Sis personality, being on better terms with William despite rejecting his help earlier, and comforts Ulrich about living without Lyoko.
  • Twice Shy: Leading to a lot of Unresolved Sexual Tension with Ulrich.
  • Why Did It Have to Be Snakes?: Comments that the Kankrelats are her most hated enemies, calling them disgusting. Apparently bugs in general creep Yumi out, as she is visibly horrified by XANA's cybernetic spiders in "Bragging Rights".
  • Will They or Won't They?: She had this with Ulrich for most of the series. They decide to be just friends late into season 1, but William's introduction unearths their old dynamic. In "Echoes", it's hinted that they might start dating, but it's still very ambiguous.
  • Zettai Ryouiki: Only in the first episode; knee-high stripped socks and a miniskirt are part of the clothes she wears for the school dance.

Lyoko Avatar

  • Boomerang Comeback: A favored trick of hers to take out monsters with her throwing fans is to catch them on the return after an apparent miss. Telekinesis certainly helps.
  • Combat Hand Fan: Her Weapon of Choice. One in season 1, two from season 2 onward.
  • Dying Moment of Awesome: Subverted. She doesn't actually kick off, but just before being devirtualized in "The Secret", she throws a fan at XANA-Aelita, devirtualizing her just after being devirtualized herself.
  • Everything's Better with Spinning: invokedGeisha Tornado, a combination of her Psychic Powers and fans that involves spinning in place or while jumping to deflect the monsters' lasers.
  • Geisha: Her outfit form seems to be at least partially based on one, altered to fit that of an Action Girl.
  • Giant Waist Ribbon: Part of the geisha-looking outfit; she uses the big knot to store her Combat Hand Fan.
  • Jack-of-All-Stats: Not quite as agile as Odd, effective in close combat as Ulrich, adept at manipulating the environment as Aelita, or having William's sheer power — but able to perform well in all four areas.
  • Long-Range Fighter: Unlike the real-life art of tessenjutsu, her fans are only functionally harming if they are flying, which means she is obliged to use them as throwing weapons. However, this is averted twice during season 4: In "Wreck Room", she attempts to slash William with her closed fan, but misses due to the weapon's short range. Then in "Music to Soothe the Savage Beast", Yumi successfully strikes a Manta with the two fans in her hand, but this only inflicts some minor damage to it.
  • Mind over Matter: Her main power is Telekinesis, moving the landscape of Lyoko or her friends with her mind. She once sends a large rock tumbling toward a herd of Kankrelats, crushing a dozen of them in the process.
  • One-Hit Kill: Zigzagged. Her fans sometimes instantly destroy monsters without even touching their weak points, while in other episodes they merely dismember the enemies. William generally tanks it, however.
  • Our Ghosts Are Different: By design choice or goof, her kimono is tied with the right lapel over the left. In real life, only burial kimonos are tied that way; a living wearer sporting it is seen in Japan as a sign of incredibly bad luck or a visual cue that he or she is actually a ghost.
  • Le Parkour: To great effect when she combines her psychic powers with her acrobatics.
  • Precision-Guided Boomerang: Her tessen fans can be thrown and always return to her.
  • Pstandard Psychic Pstance: She sometimes makes this gesture when using her Telekinesis. More so in Season 4.
  • She-Fu: She takes a far more graceful and gymnastic approach to fighting enemies than Ulrich and Odd, even although she is not as fast as the former or as agile as the latter.
  • Three-Point Landing: She often lands in this pose following some of her acrobatics, including sometimes when just virtualized.

Season 4 Avatar

  • Fashionable Asymmetry: A shorter sleeve on one side, a buckler-like bracer, one stocking different from the other, and sakura petals on her thigh.
  • Gratuitous Ninja: Her upgraded costume makes her look more like a ninja than the previous geisha.
  • Hard Light: When "translated" on Earth.
  • Sensual Spandex: Like all S4 avatars, this one outfit nicely shows her virtual curves.
  • Wrecked Weapon: William crushes her two fans in "Lab Rat". This renders her defenseless, as Jérémie has little experience programming them.

    Jérémie Belpois 
https://static.tvtropes.org/pmwiki/pub/images/jeremie_6058.png
Jérémie (Jeremy) Belpois

"OK, XANA. What do you have in store for us this time?"

Voiced by: Raphaëlle Lubansu (French), Corey Padnos (English, 2001), Sharon Mann (English, 2004-2007), Claudio Velásquez (Latin American Spanish, Seasons 1-2), Alan Prieto (Latin American Spanish, Seasons 3-4), Juan Antonio Soler (European Spanish), Yoshiko Kamei (Japanese)

Jérémie is the computer genius whom operates the Supercomputer and allows the interface. He's also the leader of the Team, and shows good tactical skills even under pressure. As the most level-headed, he keeps the infighting within the group to a minimum. He can even get a bit authoritarian, despite being the youngest. Jérémie is one year younger than Ulrich and Odd, having skipped a grade. He has more than a crush on Aelita, and it's largely this motivation that keeps the Team going in time after time to shut XANA down. Though he has been virtualized twice, this has never been done on camera — something of a Lampshade Hanging on the second occasion.


  • Adorkable: He is pretty much the archetypal geek, so this is a given. Though this is mostly visible in his relationship with Aelita; he is fairly comfortable with his little group of friends, and doesn't seem to care about what people think of him outside of them.
  • As You Know: Usually the one to deliver exposition.
  • Badass Normal: He doesn't fight and was only virtualized twice as far as we know. However, he's by far the most important member of the group, thanks to his programs. Heck, in "Fight to the Finish", most of the credit in XANA's defeat is due to Jeremy and Franz Hopper. There's a reason XANA considers him his mortal enemy.
  • Beta Couple: His relationship with Aelita is much smoother compared to the tumultuous one of Ulrich and Yumi.
  • By the Power of Grayskull!: Scanner: Jérémie! Virtualization!
  • Character Development: Was more demure and unsure of himself in earlier episodes. By Season 4, he's settled comfortably in his role as Mission Control and is more on-point in his plans to fight XANA.
  • Crazy Jealous Guy: Displays this in "Saint Valentine's Day", when he gets angry and possessive at the thought of another boy giving Aelita a Valentine's Day present. Odd even calls him out on acting like Aelita's his property.
  • Cybernetics Will Eat Your Soul: During Episode 38, he deliberately repeated Returns to the Past so he could utilize a special neuronal headset to increase his intelligence. However, this ended up hurting him mentally and physically, as he became increasingly irritable and was prone to fainting spells while under the device's influence. To add insult to injury, he actually wasn't getting smarter at all, and at the end of the episode, he destroys the headset.
  • The Dulcinea Effect: As soon as he meets Aelita and sympathizes with her, he becomes obsessed with finding a way to defeat XANA without having to sacrifice her, despite shutting down the Supercomputer with her still inside being the easier way out. Frequently lampshaded by the other Lyoko Warriors.
  • Everyone Knows Morse: He uses Morse Code to communicate with the others in Skidbladnir (actually only with Yumi, who claims to know it to secretly communicate with her brother). Given how Crazy-Prepared he is most of the time, he probably learned to use in case of an emergency.
  • Everything Is Online: He can use the supercomputer to do a bunch of things that he really shouldn't be able to do. This is the only real explanation.
  • Forgets to Eat: Frequently; he often passes off his portion of meals to Odd so he can focus on finishing this program or that one.
  • Friendless Background: Prior to turning the computer on, he didn't have any friends. This is one of the reasons why he doesn't want to turn off the SuperComputer in "Echoes": He's afraid his friends will abandon him after that's done.
  • Gadgeteer Genius: Practically every upgrade, program or device used by the Lyoko Warriors is created by him. He also is shown to build a lot of robots as his hobby, and once manages to make a nearly functional EMP bomb.
  • Good Counterpart: Develops into a full-fledged anti-XANA as he gains more experience with the Supercomputer. XANA takes note, since Jérémie seems to be his most hated foe.
  • Hand Behind Head: His standard pose when he's not hunched over the supercomputer's keyboard.
  • Hypocrite:
    • During the episode "Saint Valentine's Day", he gets jealous over Odd (supposedly) giving Aelita a present and acts like it's not allowed, but later tells Ulrich and Yumi that they shouldn't be upset over the other receiving presents from Sissi/William.
    • He's angry at Ulrich for utilizing a Return to the Past to help Yumi's family (specifically, to get them the winning lotto ticket when her father loses his job), because it made XANA stronger for selfish reasons. Yet in Episode 38, Jérémie performs multiple Return to the Pasts to increase his intelligence, making XANA much stronger for even more selfish reasons.
  • In-Series Nickname: "Einstein," "Frankenstein," "Frank-Einstein," "Brainiac" (only in the video game), and on one occasion "Ben Franklin".
  • The Insomniac: Frequently spends entire night working on programs to materialize Aelita or improve the Lyoko Warriors' equipment. In one episode, Aelita finds out he didn't even realize the night was over. In another, he actually falls asleep on the keyboard and it is noted by Odd from the key marks on his face.
  • Jerk with a Heart of Gold: He cares deeply about his friends and saving the world from XANA, but he can also be smug, snappish, and hypocritical. In an inversion of how this trope usually goes, the "jerk" parts becomes more noticeable in later seasons, as he grows more obsessive about fighting XANA and less tolerant of "wasting time" with his friends.
  • Layman's Terms: Often has to repeat himself in simpler terms, because he forgets that everyone else isn't a super-genius.
  • The Leader: Type 1: Mastermind. He directs everyone from the Supercomputer.
  • Love at First Sight: Towards Aelita.
  • Mad Scientist: He has his moments, especially when he tries to use inventions he picked from Franz Hopper's journal. They tend to backfire.
  • Megane: He wears oval-shaped glasses; aside from looking adorable, they make him look very professional.
  • Mission Control: The resident computer programmer, he's far more useful out of Lyoko.
  • Mr. Exposition: As a computer specialist, he can explain things, in particular the mechanics of Lyoko and the Supercomputer.
  • Nerd: A completely textbook example.
  • Nerd Glasses: Up to Meganekko levels.
  • Non-Action Guy: Usually, though to be fair, he is much more useful at the Supercomputer than on Lyoko. Subverted in "Ghost Channel" and in "Maiden Voyage", with a little dose of The Greatest Story Never Told. He himself apparently dislikes going on Lyoko.
  • No Social Skills: Implied; it's confirmed he had basically no friends before forming the Lyoko Warriors (and he only got closer to them because they got involved with Lyoko), and even after he befriended them, his exchanges with them tend to be rather professional and focused on their missions. He gradually gets better as the show goes on, especially after Aelita get materialized. In the final episode, he is reluctant to shut down the Supercomputer because he fears that without Lyoko to keep them together, he will lose the only friends he ever had.
  • Pair the Smart Ones: With Aelita.
  • Playful Hacker: At first. Character Development gradually strips out the "playful" part.
  • Rapid-Fire Typing: Wild Mass Guessing presumes the keyboard on the Lyoko supercomputer has a second Return key in place of the capslock key. That or Jérémie types at a ridiculously high WPM. Or both.
  • Science Hero: He dislikes going on Lyoko, and it's suggested he is a poor fighter anyway. He makes up for it by being the Supercomputer operator and creating most of the upgrades the Lyoko Warriors use.
  • The Short Guy with Glasses: He's not particularly short, but Yumi, Ulrich, and Odd's hair are all taller than he is. Only Aelita is about his height.
  • The Smart Guy: He's the only one who knows how the Supercomputer works or how to get to Sector Five or materialize Aelita; the list goes on.
  • Smart People Play Chess: He's seen playing with Ulrich in a couple of episodes.
  • Spell My Name with an "S": Either Jérémie or the anglicized Jeremy. The former is the official spelling.
  • Team Dad: A Bumbling Team Dad, but a Team Dad nonetheless. He's the only one who comes close to Yumi in terms of maturity, even if he does get a little carried away sometimes.
  • Techno Babble: His exposition bits can turn out like this sometimes.
  • Teen Genius: He is the youngest member in the team, yet he can build robots and regularly operate on a nuclear supercomputer most real people would have trouble even making work.
  • Too Clever by Half: Jérémie is so self-assured in his intellect, he thinks he can't possibly make mistakes. Unsurprisingly, this means he makes a great many. "Marabounta", "Temptation", and "Vertigo" are just a few examples of times he's thought he's created the perfect anti-XANA weapon/self power-up/anti-virus, and had it backfire horribly.
  • Took a Level in Jerkass: He already tends to be overworking and a bit snappish (especially when he thinks people are wasting time or not focused on the fight), but becomes even moreso in Season 4. One example? In "Opening Act", he gets angry when he finds out Aelita wants to audition for the Subdigitals, telling her not to "waste her time" (and in the original French, even says it's stupid to her face), much to her crestfallen hurt.
  • Voice with an Internet Connection: So much so that he now serves as the page image.
  • Wise Beyond Their Years: Despite his general lack of common sense, he does show a surprising amount of insight.
  • Workaholic: He's completely focused on the fight against XANA, almost to the point of obsession. This causes strife between him and Aelita several times, such as in "Final Mix" and "Music to Soothe the Savage Beast"; she wants to live her new life to the fullest and is angry he won't spend time with her, while he wants to beat XANA and is angry that she won't let him work.

Lyoko Avatar

  • Informed Flaw: Although never seen onscreen, his friends' comments imply either Jérémie's avatar looks weird or he sucks at fighting in Lyoko, if not both.
  • Take Our Word for It: When Ulrich is asked how Jérémie's first performance on Lyoko went: "He was ridiculous..."
  • The Un-Reveal: Each time he went on Lyoko, it either happened offscreen or had a specific condition that caused him to keep his normal appearance instead of an avatar. Averted in the novels, where his avatar is finally described. It's an elf in green tights similar to [1].

    Aelita Stones 
https://static.tvtropes.org/pmwiki/pub/images/aelita_8678.png
Aelita (Maya) Stones (Lyoko / Hopper / Schaeffer)

"And just forget about my past, you think that's easy? You didn't spend ten years of your life as some sort of computer software!"

Voiced by: Sophie Landresse (French), Sharon Mann (English), Xóchitl Ugarte (Latin American Spanish), Olga Velasco (European Spanish), Yu Shimamura (Japanese)

Aelita started out as the Damsel in Distress in the series. Unlike the other characters, she seemed to have originated on Lyoko, and survived there for years. The first season of the show deals with Jérémie and the Team trying to figure out a way to materialize her into the real world. She originally had two special abilities in Lyoko: she could enter the access towers that XANA uses to interface with the real world and shut them down, and she had the ability to morph the virtual landscape around her to create walls, rockslides, etc. Starting with Season 3, she was no longer in danger of being killed if losing all her Life Points. She gained the ability to attack with spheres of energy as well, and obtained wings in Season 4 with her new outfit.


  • Action Girl: Initially not, but she starts developing traits of it in season 2 and fully becomes one starting with season 3.
  • Adorkable: Watch any romantic scene between her and Jérémie and try not thinking she is absolutely precious. That being said, come Season 3 and she's much more confident in herself.
  • All-Loving Hero: While she gets angry like a normal person, Aelita has the kindest heart in the show. She's the only one of the Lyoko Warriors to forgive William (even though what happened wasn't his fault), and in "Marabounta", she shows pity for XANA's monsters, being unable to watch their deaths at the titular creature's hands. In the novels, her forgiveness even extends to XANA himself.
  • Bad Dreams: In "Mister Puck". They end up being the key to finding Franz Hopper's diary.
  • Benevolent A.I.: Subverted; the others initially assume she is one, but it's later revealed she's human to begin with.
  • Beta Couple: Her relationship with Jérémie is much smoother compared to the tumultuous one of Ulrich and Yumi.
  • Break the Cutie: Poor girl just can't catch a break. Aside from the various times where Jérémie almost found a way to materialize her only to fail at the last minute, season 2 ends with The Reveal she wasn't really an Artificial Human, but a real girl whose memory was accidentally erased. It gets so bad she actually ends up trying to kill herself.
  • By the Power of Grayskull!: Transfer: Aelita! Scanner: Aelita! Virtualization!
  • Can't Live Without You: In season 2, XANA manages to ensure that, even if she is outside Lyoko, shutting down the Supercomputer will still result in her death, by removing her latent human memories.
  • Character Development:
    • Lots, to the point that she eventually becomes the show's central protagonist. To be specific, in Season 1, she's stuck in Lyoko and only interacts with the other Lyoko Warriors, behaving as a program becoming more familiar with human emotions. Season 2 takes a darker turn with this, where she's a rather demure and fragile Martyr Without a Cause while adjusting to the real world. From Season 3 onwards, she's a more open and normal Plucky Girl.
    • She also goes through an arc of carving a life for herself in the real world. At first she clings to her friends, relying on them to provide her with knowledge she lacks. Over time, Aelita discovers an enjoyment of music, becomes skilled at mixing tunes, and stands her ground on pursuing this hobby. She even becomes a pre-performance DJ for the Subdigitals!
  • The Chick: She is the team's emotional center, quick to advocate trust and friendship.
  • Child Popstar: She discovers a talent for mixing music in "Final Mix", which she quickly cultivates. Her talent is so prodigious she wins a contest and catches the attention of the famous band the Subdigitals.
  • Damsel in Distress: She plays this entirely straight in season 1 given that the team's goal is get her out of the super computer, and is frequently Xana's target. The others have to play bodyguard because she has no weapon other than Creativity, and she dies for real if she loses all her life points. She gets a bit better in season 2, but still finds herself depending upon the other three most of the time. By season 3 she's upgraded to Action Girl status.
  • Designated Victim: Very justified, since she is the key to stop XANA from attacking Earth, and Hopper clearly had major plans concerning her and Lyoko. As such, it's only natural for XANA to focus on her, though his reasons change with the situation every season.
  • Disney Death: Happen several times. The specific episodes being "Just in Time", where she's deleted because of a bug in her annex program, "The Key", where the Scyphozoa drains all of her memories, rendering her an empty shell, and "Distant Memory", where she's thrown into the Digital Sea. She's saved by Jérémie the first time thanks to one of his earlier rematerialization experiments, and the others are by her father, Franz.
  • Dreaming of Things to Come: In season 4, where she dreams of her father's Heroic Sacrifice.
  • Driven to Suicide: At the end of season 2, she tries to commit a Heroic Sacrifice by shutting down the Supercomputer. Jérémie manages to save her just in time.
  • Everything's Better with Princesses: She isn't really a princess, but Odd likes to call her one. (It ends being an astonishingly adequate nickname after discovering her father is Franz Hopper, who is metaphorically Lyoko's king.)
  • Fetal Position Rebirth: When she's finally de-virtualized, she emerges like this. Ironically, unless Jérémie programmed the clothes she was wearing, the aversion of Naked on Arrival should have tipped the Lyoko warriors that she was actually a human girl who had been virtualized a long time ago.
  • Give Geeks a Chance: Jérémie being a geek clearly never was a problem to her. Granted, she's a tad geeky herself.
  • Human Popsicle: Although not through cryonics — she didn't age for 10 years while virtualized inside the Supercomputer.
  • Hidden Buxom: Appears to be surprisingly well-endowed those few times she isn't dressed in heavy, baggy clothing.
  • I Have Many Names: She only has one real name, but has to rely on various fake names in the series. Her current alias is Aelita Stones.
  • In-Series Nickname: "Princess". Considering her father is the creator aka 'king' of Lyoko, it turns out to be pretty meaningful.
  • Kiss Me, I'm Virtual: Aelita is an A.I. stuck in the virtual world. This doesn't stop Jérémie from falling for her and doing everything he could to materialize her on Earth. Subverted when it is discovered she's in fact human.
  • Laser-Guided Amnesia: The reason she started out believing she was just an A.I. She gets her memory back at the end of season 2. Season 4 later reveals that she's still missing a few however, such as her actual birthday.
  • Little Miss Snarker: Full-fledged in Seasons 3-4, but there was some present before then.
  • The Load: Especially in Season 1. Grows out of it throughout Season 2, and definitely no longer by Season 3.
  • Love Interest: For Jérémie.
  • Luminescent Blush: More often than the rest of the cast, which only adds to her being The Cutie. Aelita blushes when Yumi calls her pretty and when her friends stumble on a "personal joke" between her and Jérémie.
  • Mad Scientist's Beautiful Daughter: She's actually Franz Hopper's daughter, and considering his work on Project Carthage and Lyoko, he definitely qualifies for the, "mad scientist" part of the trope.
  • Magical Girlfriend: Downplayed in regards to Jérémie, due to her connection to the virtual world. Of course, outside of Lyoko, where there are no powers, this aspect is moot.
  • Magic Skirt: Justified, at least in the virtual world where skirts aren't necessarily made of fabric. Played straight in the real world with her first outfit, but she's never really in any compromising positions where this comes into play.
  • Martyr Without a Cause: Aelita was often a bit too eager to sacrifice herself in Seasons 1 and 2. Sadly justified in that it would end XANA's menace once for all. XANA even tries to take advantage of this in "Missing Link": he uses the Scyphozoa to steal Yumi's DNA sequence code because he knows that Aelita will transfer hers over to Yumi (stating that "Yumi's place is on Earth"). This leaves Aelita's memory exposed for him to take at will.
  • Meaningful Name: Her name is probably a reference to the titular character of the novel by Aleksey Tolstoy, who was also a prominent figure of another world and had a relationship with a lonely scientist.
  • Missing Mom: Her mother is seen in flashback and has been named by Word of God as Anthea, but was kidnapped for unknown reasons by the MiB. It has still yet to be revealed what has become of her.
  • No Social Skills: At first in Season 2, she has little to no idea how the real world works. Even after spending time on it, she is still a bit of The Ingenue for a time. Season 3 and onwards however, have her fully shed this trope, and she's shown to be far more sociable than Jérémie.
  • Older Than They Look: Aelita is chronologically 23-24, but ten of those years were spent asleep in Lyoko (and another full year in avatar form), so she looks, acts, and biologically is 12-13. Finally confirmed in "Wrong Exposure", where Jérémie takes advantage on it to prevent Delmas from figuring out her relation to Franz Hopper.
  • Pair the Smart Ones: With Jérémie.
  • Pet the Dog: In the penultimate episode, she's the only Lyoko Warrior who sympathizes with William after he's been freed from XANA, and is willing to stick up for him when the others reject him. It doesn't have any payoff since the others still prevents William from going to Lyoko, and XANA later possesses William one final time while she ends up focusing more on her father, but it's the thought that counts.
  • Pink Means Feminine: The girliest of the group by far, and has an overwhelmingly pink color scheme. Everything she has tends to be pink.
  • Plucky Girl: You'd be surprised that someone this cheery and energetic was trapped in a supercomputer and hounded by an evil program for 10 years.
  • Rose-Haired Sweetie: She fits about all the traits associated with this. She's a sweet and good-natured girl most of the time and while her love interest, Jérémie, doesn't have blue hair, he is associated with the color blue.
  • Sealed Good in a Can: Season 1 and, to a lesser extent, 2. The only reason why the heroes refuse to shut down XANA is because they are hell-bent on severing her ties to Lyoko.
  • Single Woman Seeks Good Man: The reason she fell for Jérémie was because of his persistence in helping and trying to make her happy without seeking thanks or reward.
  • Smart People Play Chess: She's Jérémie intellectual equal, and often plays him in chess.
  • Teen Genius: She rivals Jérémie in that area, though it's unclear how much is natural and how much comes from her spending years as a program.
  • Took a Level in Badass: In season 1, Aelita required Odd, Ulrich and Yumi as bodyguards, and her only use is deactivating towers. Out of all 26 episodes of season 1, she only destroys one monster. By season 4, she's the most capable Lyoko Warrior of all — not only does she have Energy Fields, which are more powerful than any other Lyoko weapon, she also has wings for flight and an ability that allows her to reshape the very world of Lyoko. It's also worth noting that XANA-possessed Aelita has only ever been defeated once, and even then Aelita had already disposed of Yumi and was only devirtualized when a wayward fan hit her by sheer luck.
  • Undead Tax Exemption: Averted. The Lyoko Warriors have to do the work to create an identity for her (though Jérémie is very good at "arranging" her paperwork), and there are enough holes in it for Sissi to occasionally piece together that something's going on.
  • Why Did It Have to Be Snakes?: Twice, in the form of:
    • Why Did It Have to Be Wolves?: They feature heavily in her recurring nightmares. She thankfully never has to deal with them in the present-day. The same cannot be said for...
    • Why Did It Have to Be the Scyphozoa?: She really catches the Distress Ball whenever it pops in, even in later seasons when she's the most powerful member of the group.
  • You Gotta Have Blue Hair: Pink hair, in her case. Unlike Odd's purple spot, hers is not dyed; Aelita's mother had the same inexplicable hair colour that she inherited.

Lyoko Avatar

  • An Ice Person: Whenever Aelita uses Creativity in the Ice Sector. In one memorable scene she was able to momentarily incapacitate the Scyphozoa by freezing it solid.
  • Barrier Warrior: Her energy fields. Taken Up to Eleven when she combines them with her Creativity power, creating a giant wall to protect the Skid in season 4.
  • Calling Your Attacks: When she gets the ability to use Energy Fields, she does this.
  • Deadly Dodging: Her main way of fighting before getting her Energy Fields.
  • Decoy Getaway: Aelita can create short-lived clones of herself to act as decoys while she escapes to safety.
  • Deflector Shields: She can fuse two of her offensive-oriented Energy Fields to create a small shield that can stop a Megatank laser.
  • Distress Ball: Even after becoming an Action Girl, she always panics whenever the Scyphozoa is involved, and ends up getting possessed. This is particularly frustrating in "Wrong Exposure", where she forgets that she has wings, and thus could escape the Scyphozoa by flying away.
  • Dub Name Change: Her Energy Fields were translated as "Energy Balls" for a season in the Spanish dub.
  • Energy Ball: Her main offensive ability, which she gets in Seasons 3-4.
  • Facial Markings: A red line on either cheek in her Season 1-3 avatar. They move down in Season 4, starting from the lower part of her face and stopping where the original marks ended.
  • Hypnotize the Princess: Whenever the Scyphozoa get ahold of her, this is the inevitable result.
  • Lotus Position: Aelita uses this pose when "listening to XANA's pulsations" in Season 1 (and once in season 4).
  • Neuro-Vault: Her memories hold the Keys of Lyoko, which XANA tries to siphon out of her brain with the Scyphozoa in season 2.
  • One-Hit Kill: Her energy fields can either instantly destroy monsters or paralyze them, making her the most powerful member of the team in terms of pure power. Then XANA-William came in the picture and was able to tank several of these. Only a fully-charged energy field can instantly get rid of him.
  • One-Woman Wail: How she invokes her Creativity power.
  • Override Command: Code: LYOKO
  • Pointy Ears: Fitting with her elf/angel motif.
  • Psychic Powers: Creativity, which telekinetically reshapes the environment, and Second Sight, which gives her omnipresent awareness of everything in Lyoko.
  • Reality Warper: Downplayed; she can only manipulate Lyoko's territory. However, in "Ghost Channel", Aelita has shown the ability to cause events on Earth much like XANA (she distracted Mr. Delmas and Jim by blowing up pipes), but without needing to use towers. That said, it doesn't reach XANA's level in terms of sheer power.
  • Superpower Lottery: The Annex Program allows Aelita to possess cybernetic artificial intelligence, gives her the ability to read and understand computer files and binary codes, allowing her to access any interface, such as in towers and Sector Five. This is the main reason XANA focuses on Aelita on Lyoko: with the Annex Program, she can stop deactivate the towers and stop XANA's attacks. While it doesn't comes off as extremely useful in battle, it is still one of the most powerful Lyoko powers due to its versatility, and only William's Super Smoke can compare.
  • Support Party Member: Seasons 1-2. She can't fight, but she's the only person who can deactivate the towers. Her Second Sight is also extremely helpful to the party.

Season 4 Avatar

  • Flight: A new power she gains, thanks to a pair of energy wings.
  • Hard Light: When "translated" on Earth.
  • Master of All: By this point, Aelita has an long-ranged one-hit-kill attack, a defense that can block both physical hits and the most powerful XANA monster's attack save for the Kolossus, the ability of flying without a vehicle, and the ability to reshape the very environment. If she were more aggressively or tactically-minded, she would probably outwork all the other Lyoko warriors in the battlefield with the sole exception of William. It shows when XANA manages to possess her one last time in "Wrong Exposure", where she manhandles Ulrich, coming very close to devirtualizing him.
  • Power Gives You Wings: Aelita's upgrade came with a pair of "Angel Wings" integrated into her suit.
  • Sensual Spandex: As with all Season 4 avatars.
  • Skirt over Slacks: A translucent, plastic-like skirt.
  • Technopath: Cannot manipulate Earth's landscape when translated. Instead, her Creativity becomes this, allowing her to hack into computers and unlock doors.
  • Winged Humanoid: When she uses her Angel Wings.

XANA-Aelita:

Exactly What It Says on the Tin, Aelita whenever she is brainwashed by XANA, which has happened enough for its own section.
  • The Bad Guy Wins: She's a major reason XANA won in Season 3, as she destroyed 3 sectors. XANA slowly creeping his way to victory led the Lyoko Warriors to hastily accept William on the team, whose lack of experience provided the program with the final tool it needed to destroy Lyoko.
  • Brainwashed and Crazy: She is the result of XANA taking control of Aelita: With a necklace in a Season 2 episode, and the Scyphozoa implanting a virus inside Aelita's brain during Seasons 3 and 4.
  • Characterization Marches On: During "Saint Valentine's Day" and Season 3, she's The Stoic, very rarely reacting more than she has to in regards to the situation at hand. Her possession in Season 4 has her act like a even more sadistic version of XANA-William, yelling and screaming while she attacks, and generally being very deranged.
  • Demonic Possession: In her first appearance, XANA tricked Aelita into wearing a necklace that slowly implanted impulses into her mind, bypassing the protection granted by the scanners.
  • The Dragon: She's essentially XANA's in Season 3, being used in order to cut off all access to Sector 5. It fails, but XANA-William finishes the job in "Final Round" by destroying Lyoko.
  • Harmful Healing: By season 4, Jérémie has developed a program to rid Aelita of viruses should the Scyphozoa get to her. However, it also leaves her horribly weak, and she struggles to not pass out while making her way to the tower afterwards. Downplayed in that it does accomplish its main purpose.
  • Katanas Are Just Better: During her sole reappearance in season 4, she steals one of Ulrich's katanas and favors using it in place of her own powers to fight, only using her Energy Fields once.
  • Light Is Not Good: Granted, since XANA never got ahold of her the way he did with William, he never had the chance to give her an Evil Makeover, but considering Aelita's usual colors are pink and white, she counts as this.
  • Slasher Smile: She gives an absolutely terrifying one in her sole reappearance in Season 4.
  • Superpowered Evil Side: An unusual case, since she's only around if XANA can actually take control of Aelita, but XANA makes much more effective use of Aelita's abilities than she does, spamming Creativity and Energy Fields much more than Aelita's regular usage, proving how unstoppable she would be if she went all out with her powers. It helps that XANA boosts her physical capabilities and strength in the process.
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    William Dunbar 
https://static.tvtropes.org/pmwiki/pub/images/william_3298.png
William Dunbar

"I'm not the kind of guy who likes to steal the show."

Voiced by: Mathieu Moreau (French), David Gasman (English), Alexei Mayén (Latin American Spanish), Pablo Sevilla (European Spanish)

A transfer student exiled to Kadic Academy in Season 2 for spamming love notes. His primary function during the first half of his tenure is to act as a Romantic False Lead for Yumi and lampshade Ulrich's inability to spit it out in the process. William's assistance in foiling several of XANA's schemes on the real-world side proves critical in Season 3, though, and after he confides to the Team that he is starting to dream about elements of his adventures that should have been erased with the Return to the Past, the Lyoko Warriors reluctantly (but unanimously) take him on as their newest member. It goes downhill from there. Mind-controlled by XANA (and stripped of his higher vocabulary in the process), William spends the majority of Season 4 as the Lyoko Warriors' most consistent virtual threat. He gets better, but the show ends two episodes later, and on kind of a harsh note for him.


  • The Atoner: Subverted; he attempts to be this in season 4 finale, but is rejected by the Lyoko Warriors. The best help he ended up providing was to inadvertently save the day in "The Lake" (and even then, it was also because Yumi was around) and distract Sissi in "Fight to the Finish".
  • Badass Normal: Even in the real world, William is no joke. He wiped the floor with his entire xanafied class in episode 54 "Lyoko Minus One", deactivated a bomb in "The Secret" and defeated, while teleported, Odd and Yumi in "Cold Sweat" without using his powers. If it wasn't for Aelita, he would have sent them back to the Skid.
  • Beware the Silly Ones: With his cocky, childish, excited and downright annoying behavior in "Final Round", you certainly don't expect him to destroy nine Creepers with no effort. There is a reason XANA chose to brainwash him...
  • The Big Guy: He became the strongest Lyoko Warrior by virtue of that really big sword of his, and his special ability. Even though he was Not Himself for almost the entire Season 4.
  • Bittersweet Ending: Unfortunately for him, he was freed from XANA's control, but never got the chance to get his revenge on him and he's kicked out of the group. The best he could do to aid the heroes isn't that much, on top of that (see The Atoner).
  • Breakout Character: He debuted as a secondary character in Season 2. Unlike most breakout characters, William started out being considered a pointless ship interference. However, he became more popular in Season 3, where he became a recurring characters often helping the heroes. He ends up joining the team... Before being brainwashed in the season finale by XANA. In Season 4, he's been Promoted to Opening Titles, became a main character and XANA's unwilling Dragon. His popularity ends up skyrocketing as a result.
  • The Casanova: Completely averted. Yumi calls him one, though he only ever pursues her. That said, he does show himself capable of and willing to seduce other girls — namely Sissi — when the group needs it in "Fight to Finish".
  • Card-Carrying Villain: While under XANA's control, he tends to behave like a stereotypical villain (if he actually talks), taunting the heroes and laughing all the while. A rare example that doesn't diminish his threat level, since he's quite capable of hurting the heroes regardless.
  • Character Development: Starts off as a Jerk with a Heart of Gold trying to seduce Yumi in Season 2, becomes a Stalker with a Crush (even though he actually never stalked her in Season 3) who can be serious when he realizes how dangerous the situation truly is (he didn't realize how bad things were in Final Round, hence why he was cocky), and in his few appearances in Season 4 as himself he matured (leaving Yumi alone when she rejects him again in the last episode and not being angry at her for example, wanting to fight seriously on Lyoko...).
  • Chekhov's Gunman: He starts off as a minor character and a Romantic False Lead for Yumi before becoming the Sixth Ranger to the Lyoko Warriors. And then becoming The Dragon for the remainder of Season 4.
  • Dark Magical Girl: He may not have the whole Parental Abandonment thing nor the Dark and Troubled Past (if anything his parents seems pretty nice and his life was pretty normal until then), but otherwise? Good guy brainwashed by evil? Check. More powerful than the heroes? Check. Heel–Face Turn after being saved? Check. Undying Loyalty, even if the Lyoko Warriors (bar Aelita) are jerks towards him in the second-to-last episode? Check. Angry about being cast out of the team, doesn't understand why they are angry at him, left alone? Check.
  • Demoted to Extra: Barring flashbacks, he merely makes a cameo in the novels.
  • The Determinator: He never gives up on seducing Yumi, even after all that happened by the end of the show.
  • Flashback Nightmare: William has dreams about things that should have been erased with the Return to the Past — one of the factors that led to his becoming a Lyoko Warrior.
  • Foil:
    • To Odd. Both can act silly, arrogant and childish, but also deeply care for their loved ones and should not underestimated at all. But while Odd is a Casanova Wannabe, William only loves Yumi. While Odd is probably the weakest Lyoko-Warrior in terms of power, William is by far the strongest Lyoko-Warrior. Odd is one of the smallest Lyoko-Warriors while William is the talliest one. While Odd ended up being accidentally involved in the story (in the prelude), William was recruited. And while Odd is a willing hero, William is an unwilling villain.
    • To Aelita too. While both are powerhouses, must be rescued and materialized on Earth in a season (Aelita in Season 1, and William in Season 4), lack vehicles in the proper sense of the word and single-handedly started a plot (Aelita is critical to the entire story, being the reason Jeremy refuses to shut down the supercomputer, while William forced the heroes to adapt to a new threat) Aelita is a All-Loving Hero, while William is a Jerk with a Heart of Gold. While Aelita is one of the smartest characters of the show, William is at best average in terms of smarts. Aelita's powers revolves around creation, while William's revolves around destruction. No wonder they had trouble getting along on Lyoko in Final Round, even though they're friends on Earth.
  • Heel–Face Door-Slam: Sadly, after freeing him, all Lyoko Warriors but Aelita (and Jérémie, who just doesn't care) have difficulties forgiving him for what he did under XANA's control (despite Aelita pointing out it wasn't his fault and it could have happened to any of them). It goes as far as when he attempts to redeem himself by helping them, Yumi (Ulrich and Odd to a lesser extent) violently rejects him and refuses to let him go to Lyoko, arguing XANA might seize the opportunity to control him again. Ironically, this is exactly what happens... except XANA is able to control him through a tower because he is still on Earth. Nice job, Yumi!
  • Jerk with a Heart of Gold: He's rebellious and cocky and really doesn't know how to take no for an answer. He's also brave and laid-back around people other than Ulrich—and even then, he can put aside his rivalry with Ulrich when needed, like giving him some "friendly advice" or listening to orders.
  • Leeroy Jenkins: This is what causes him to end up possessed by XANA; he got too caught up in battling XANA's monsters, and thought he could take on the Scyphozoa... Quite simply put, he couldn't.
  • Love Makes You Crazy: "Makes me totally insane." by his own admission. Not so much in Season 2, but definitely in Season 3.
  • Mr. Fanservice: Completely intentional on his part.
  • New Transfer Student: He got expelled from his old school for spamming love notes.
  • Nice Job Fixing It, Villain!: When fighting against XANA's control in "The Lake", he inadvertently gave enough time to Aelita to reach the factory and deactivating the tower. In others words, he did what he was supposed to do as a hero: he (and Yumi) saved the day. He's the only one who ever fought against XANA's control and it's thanks to Yumi he briefly snapped out.
  • One Hit Poly Kill: In episode 54, "Lyoko minus one", William effortlessly defeated three of his Xanafied classmates with only a wooden stick and one kick. This is even more badass knowing that William was only a secondary character back then.
  • Promotion to Opening Titles: In season 4, when he becomes a major villain.
  • "The Reason You Suck" Speech:
    • When giving a piece of advice to Ulrich in "Marabounta" , he's also clearly criticizing him for not having confessed to Yumi yet:
      William: Uh-uh, no, that'd be too easy, Ulrich. Let me tell you what's wrong around here. My being around Yumi forces you to ask yourself a question, a tough question that you can't answer. Here's a piece of friendly advice: go and talk to Yumi, from the heart. Or else, one day, I will! And then I really will be your problem!
    • Surprisingly, in "The Secret", not even Yumi is spared when he calls her out for not trusting him:
      William: Maybe it’s just because they trust me! Not like... [refers to Yumi]
  • Reformed, but Rejected: In the finale. He isn't present when the supercomputer is shut down, but he seems to have at least managed to return to being on civil terms with Yumi. He is still bitter about being rejected, though.
  • Romantic False Lead: To Yumi. In his first appearance, she seems to give back some of his feelings, but she gets annoyed by his Stalker with a Crush attitude as the show goes on. By season 3, it's made quite clear he never had any chance with her to begin with.
  • Sixth Ranger Traitor: Joins the Lyoko Warriors at the end of Season 3, only to be possessed by XANA on his first mission and end up as The Dragon for Season 4.
  • Stalker with a Crush: Subverted. While he never actually stalks Yumi, his approach to her gives off this vibe in Season 3. He's harmless, but annoyingly persistent. He gets better by the end of Season 4, however.
  • Undying Loyalty: He could have revealed the secret the second he was thrown out of the team. He chose not to, out of sheer loyalty to the team.

Season 3 Lyoko Avatar

  • The Bad Guy Wins: Him being Xanafied is what allowed XANA to destroy Lyoko and win in the third season.
  • One-Handed Zweihänder: Hilariously subverted. When he tries to use only one hand to wear his Zweïhander in "Final Round", he fails miserably because the sword is too heavy.
  • One-Hit Kill: His BFS was capable of destroying multiple Creepers in a single blow.
  • Power Floats: It's implied that his main power was supposed to be Levitation (which is used twice when he's Xanafied).
  • Unskilled, but Strong: We never get to know his actual skills on Lyoko, as he is Xanafied only minutes after being virtualized. However, all he needs is one blow to destroy a Creeper.
  • We Hardly Knew You: Subverted. He didn't kick the bucket, but we don't know (and probably never will) his powers in his original avatar, this avatar appeared in only one episode (barring reused scenes in later episodes) and he was only using it as himself for 10 minutes.
  • What Could Have Been:invoked The Social Game implies that William had Ulrich's Super Sprint (which he may have used when Xanafied in "Final Round" to finish off Yumi), further emphasizing his rivalry with Ulrich.

Season 4 Lyoko Avatar

  • All Your Powers Combined: His Super Smoke power allows him to move as fast as Ulrich, fly like Aelita and can be used the same way as Yumi's telekinesis. Not to forget his Sword Beams are as fast as Odd's laser arrows.
  • BFS: His sword has exaggerated proportions, even by Zweihänder standards. It could be a Shout-Out to the Buster Sword or, in its Xanafied state, the Soul Edge.
  • Battlecry: "FOR XANA!"
  • The Bad Guy Wins: He may not have won the war, but he won most of the battles. And when he did, it was devastating.
  • Badass in Distress: One of the main plot points of Season 4 is to save him, an extremely powerful newbie, from XANA's clutches.
  • Brainwashed and Crazy: XANA's possession makes him more than a little unhinged.
  • Cool Sword: He uses a Final Fantasy-style Buster Sword.
  • Curb-Stomp Battle: An expert of this. While he is sometimes on the receiving end, he has defeated — often brutally — the heroes a lot of times, to the point of having devirtualized them many more times (at least twice as much) than they devirtualized him.
  • The Dragon: He becomes XANA's top enforcer, issuing orders to the monsters and overall offering a much bigger threat than them.
  • The Dreaded: His sheer power frightens the heroes even when they win. This is best shown by Jérémie's Oh, Crap! reaction in "Cold Sweat" when William is teleported.
  • Dying Moment of Awesome: Subverted. He doesn't actually kick the bucket, but in "Down to Earth" (the last episode where XANA-William is fought on Lyoko), he manages to defeat Ulrich one last time before Odd finishes him off. The Bad Guy Wins even when he loses.
  • Evil Costume Switch: After being possessed, his original white attire is replaced by one that is Red and Black and Evil All Over.
  • Facial Markings: An Eye of XANA sometimes flashes on his forehead.
  • Fetal Position Rebirth: At the end of Season 3, XANA saves him from death after Lyoko is destroyed, and he's seen floating above the void in this position.
  • Fighting from the Inside: In the French version, he attempts this during "The Lake", where he tries to fight off XANA's control, but fails. In the English version of the same episode, Yumi mentioned that he actually, if only for a while, succeeded in snapping out of XANA's control.
  • Fingerless Gloves: Started in Season 4. He had simple gloves in Season 3 through.
  • Forced Sleep: One of the many applications of his Super Smoke. William can force it into other avatars' airways, causing them to pass out. This is used often against Aelita, making her helpless and unable to fight back as he transports her to be thrown into the Digital Sea.
  • Hard Light: His virtual avatar is "translated" to Earth in the episode "Cold Sweat".
  • Hoist by His Own Petard: William has a tendency to attack his enemies from behind and send them to the Digital Sea. As such, his defeats in "Down to Earth" and "The Lake" are quite ironic: Odd devirtualizes him from behind in the former and Aelita sends him to the Digital Sea in the latter.
  • Hulk Speak: His usual speech when under XANA, though he is quite capable of speaking in complete sentences. It's just that, like with most of XANA's forces, he rarely has reason to talk.
  • Hyde Plays Jekyll: Does it twice to trick Aelita early on in his possession (the first time was when he returned as XANA's new minion, and the second time was him playing off a failed program to free him from XANA).
  • Laser-Guided Karma: The first time William devirtualizes Odd, he does so by firing a Sword Beam while the latter has his back turned to him. In "Down to Earth", Odd repays the favour by shooting William from behind while he is too busy gloating.
  • Made of Iron: Could take a ridiculous amount of punishment in season 4, owing to a larger reserve of Hit Points, requiring several strikes from Yumi's fans and Odd's arrows or a fully charged-up Energy Field from Aelita to be taken down.
  • Manipulative Bastard: When Xanafied, he pretends to be his good self twice (it's ambiguous in a third case, "The Lake" — it's likely he was actually himself — , so it won't be listed here). Unlike XANA's regular tricks, the Lyoko Warriors (more precisely Aelita in the second case) fall for it. To his credit, he is a lot better at being genuine than any polymorphic clone.
  • Mark of the Beast: The Eye of XANA has been engraved on his outfit, his sword and his brain (which can only be seen when it occasionally shines through his forehead).
  • Master of All: To a ridiculous degree. He not only has the most powerful and versatile hand-to-hand weapon of the Lyoko Warriors (which basically one-shots monsters and avatars alike with a swing and can even shoot Razor Wind), but he also has a special ability that turns him invulnerable and allows him to do everything his friends can do without any drawback. And if it is not enough, he also possesses a buckler-like bracer to deflect and return physical attacks. Should we mention that he is the only Lyoko Warrior that can survive inside the Digital Sea?
  • Nonchalant Dodge: Even when not using his Super Smoke, he's a master of dodging with minimal movements, to better tease his opponents.
  • No-Sell: Anyone who falls in the Digital Sea suffers a Fate Worse than Death. However (due to his Super Smoke), it has no effect whatsoever on William, who even lives inside it while Xanafied.
  • One-Handed Zweihänder: Unlike the good William, XANA-William played straight this trope. While he is often seen using his two hands to uses his Zweïhander, he has no problem using only one hand.
  • One-Hit Kill: Almost all of his successful attacks, owing to his BFS.
  • Power Floats: While XANA is controlling him, he has the ability to levitate.
  • Psychic Powers:
    • Telekinesis — he's demonstrated the power to move things by extending a bit of his black smoke (including himself for levitating).
    • Far Sight — he can use a red-tinted telescopic vision to quickly locate his enemies on Lyoko.
  • Reality Warper: Like Aelita, it's a very downplayed case. He's able to take over towers like Aelita and XANA, and he possessed Jérémie's clone and interrupted Odd and Aelita's translation in doing so. However, again, it isn't anything close to what XANA, and even Aelita can do. He can't change the environment on Lyoko, to boot. But he's still able, on Lyoko, to take control of towers without having to go inside them.
  • Sensual Spandex: Much more so in Season 4, in an inversion of Evil Is Sexy.
  • Superpower Lottery:
    • Super Smoke is by far the best and most versatile Lyoko power ever to be granted to any character. Its uses include intangibility, super speed, telekinesis, flight, a projectile that immobilizes William's victim for an easy kill, and the ability to survive in the Digital Sea. Also, receiving critical damage causes the power to activate on its own and warp the boy back to XANA, essentially preventing materialization (and thus keeping the boy under the program's control).
    • XANA-William also has the Annex Program like Franz Hopper and Aelita, which can turn the tide of an entire battle. See Aelita's Superpower Lottery for more information on the Annex Program.
  • Super Smoke: The Trope Namer. He can turn into a cloud of black smoke (reminiscent of XANA's specters on Earth, certainly no coincidence). This allows him to move very quickly on Lyoko, on par with Ulrich's Super Speed, to fly and to phase through attacks.
  • Sword Beam: Can fire these Razor Wind-style out of his Zweihander
  • Sword Drag: Though, if you had a sword that big, you'd probably drag it as well. It is more notable before he is Xanafied, as he lacks the strength to properly wield it.
  • Theme Music Power-Up: Whenever one of his two themes starts playing, you know he's about to kick some serious ass.
  • Took a Level in Badass: After his possession, he goes from an annoying rival to Ulrich to a badass villain.
  • Voice of the Legion: As is standard with XANA possessions, he has his own voice accompanied by a demonic echo. His French voice is even better.
  • Xanatos Speed Chess: In "A Lack of Goodwill", when his clone defeats him and prevents him from directly destroying the supercomputer by sending him in the elevator and activating it, XANA-William goes to the computer room and instead attempts to melt-down the supercomputer by bugging its cooling system.

Villains

    XANA 
https://static.tvtropes.org/pmwiki/pub/images/xana_3851.png
XANA (X.A.N.A.)

Voiced by: Mathieu Moreau (French), David Gasman (English), Alexei Mayén (Latin American Spanish), Pablo Sevilla (European Spanish)

This malevolent A.I. is the main antagonist. Created by Franz Hopper to counter "Project Carthage", he rebelled against his creator and was sealed in the Supercomputer some 10 years before the start of the series. His true motivations are unknown, but he is hostile to humanity, and to the Lyoko Warriors in particular. He regularly attacks the real world through the Lyoko Towers. Being a program, he has no definite shape and manifests through the ever-present logo (or Eye of XANA) and the monsters on the Lyoko Sectors. He tries to escape the Supercomputer throughout Season 2 so that the heroes can no longer defeat him by cutting the juice, and after doing so he attempts to conquer the world in Season 4 by creating an army of robots.


  • Adaptational Heroism: He's still an antagonist in the novels, but he eventually has a Heel–Face Turn.
  • Adaptational Wimp: Played with in the novels. On the one hand, XANA's planning abilities take a severe nose-dive, and being deprived of a proper virtual world limits what he can do. On the other, he displays more advanced versions of his powers, like possessing Odd, who should be immune, thanks to Eva; materializing an entire army of robots when he does get back to Lyoko; and implementing the Lyoko-Warrior's powers in the real world.
  • A.I. Is a Crapshoot: XANA started off as a relatively simple AI, but gradually became more intelligent and malicious as time went on.
  • Ambiguous Gender:
    • "He" is a computer program, so he doesn't really have a gender to begin with, but the show usually uses "him" or "it". The sequel series sticks with "it".
    • The novels flip between "him"/"it" (and "her" when possessing Eva), but settle on "him" when his very male human form appears.
  • Arch-Enemy: To the Lyoko Warriors and Franz Hopper. More personally, he seems to really hate Jérémie.
  • The Bad Guy Wins: He partially succeeds in the season 1 finale by preventing Aelita's escape from the Supercomputer. Seasons 2 and 3 end with him fully reaching his goals (respectively escaping the Supercomputer and destroying Lyoko). It isn't until Season 4 where he's finally brought down, albeit at the cost of Franz Hopper's life. And even then, in both the novels and Evolution he manages to come back!
  • Berserk Button: According to Jérémie, him activating a tower truly enrages XANA, as the program will often go out of its way to hijack it. Or just Jérémie in general, XANA really hates the boy's guts.
  • Big Bad: He is the only villain in the entire series (if one doesn't count Evolution or the novels).
  • Born Unlucky: Due to how Season 1 overuses Just in Time, XANA always gets taken down seconds before he would have won. One particularly unlucky instance is "Satellite", where he's defeated in the milliseconds between his hacked satellite firing and the moment its laser would have killed Odd and Yumi.
  • Card-Carrying Villain: Judging by the song he used to hypnotize all of Kadic in "Killer Music" titled: "Glad When You're Bad", and some of XANA-William's dialogue choices, XANA seems to know that he's evil by human standards and is quite unapologetic about it.
  • Character Development: Ironically for a never-seen character, he gets lots of it throughout the series. His goals shift along with time according to the situation, his schemes become more complex, and his power increasing allow for varied and subtler tactics. As the series progress, he goes from something in the vein of a Generic Doomsday Villain in season 1 to a skilled Magnificent Bastard by the end of the show.
  • The Chessmaster: Not as much initially, but as the series progresses, he starts developing more complex schemes.
  • The Corruption: In the novels, it's revealed he was once a Benevolent A.I., but was corrupted by the remnants of Project Carthage's programming.
  • The Cracker: He has access to any computer network in the world and can manipulate electricity.
  • Crazy-Prepared: The Lyoko Warriors are attempting to destroy his Replikas' supercomputers in order to cut down his resources? He has long-since infected hundreds of them all over the world.
  • Deadpan Snarker: Overlapping with Silent Snarker, because he rarely speaks as himself, but XANA occasionally proves to have a wicked sense of humor. When Odd fights one of his polymorphic clones and tells it to change into a wimp, XANA just has it turn into Odd; at another point, when Aelita accidentally devirtualizes Odd while fighting the possessed William, he sarcastically compliments her aim.
  • Determinator: It does not matter how many times his attacks fail—the next episode, XANA will come knocking with a different one.
  • Enemy Mine: In "Marabounta" with the Lyoko Warriors to destroy the titular Marabounta.
  • Evil Cannot Comprehend Good: In season 1; due to his intelligence being based on pure logic, he is unable to understand why Jérémie would go into the scanners (something that is stated to terrify the young hacker) to save his friends. However, he is also notable for being one of the few villains to learn from it; in a later season 2 episode, he anticipates Aelita's Heroic Sacrifice and takes advantage of it, and his plan to kill Franz Hopper once and for all in Season 4 relies on using the man's love for his daughter.
  • Evil Only Has to Win Once: His goals may seem simplistic, but given that all he has to do is just reach that goal, it really doesn't matter how many times he's seemingly defeated. He just tries again and again until he reaches that one critical victory, which is shown very well in "The Key", where it turns out that if anyone of his attacks in the season had succeeded earlier, he would be out in the network. He also succeeds in that episode, and it takes the remaining half of the series for the Lyoko Warriors to even try and mount a proper counter-attack against him.
  • Evil Plan: Downplayed. Other than "self-preservation" he doesn't seem to have an over-arching scheme; the trouble he causes in real life during the first season is meant to kill the kids who could shut him down whenever they wanted, which tends to cause a lot of collateral damage. Once Season 2 starts up, however, XANA does end up forming a long-term plan. He intends to subjugate the world via an army of robots, which he can't do while he's restricted to one supercomputer, and kill/disable the Lyoko Warriors since they're the only people who actually know about him. As seen in The Bad Guy Wins above, he comes very close to fulfilling this plan.
  • Faceless Eye: His trademark symbol.
  • Forgotten Childhood Friend: With Aelita, in the novels. When Franz Hopper created XANA, he wanted him to develop emotions, so he encouraged Aelita to visit and play with him. They ended up becoming best friends. In a twist, they both got amnesia and forgot about it; remembering his time with her and rekindling their relationship is actually one of the catalysts for XANA's Heel–Face Turn.
  • He Who Must Not Be Seen: He doesn't even have a body to begin with. Averted in the novels, where he makes an actual physical appearance—as a teenage boy strongly resembling William.
  • Honey Trap: Several of his plans (most notably "XANA's Kiss") have involved seduction, though given his lack of a body, it's usually through possession or polymorphic clone.
  • Instant A.I.: Just Add Water!: Justified; Franz made XANA and gave him the ability to evolve, before he learned that XANA was becoming too smart... but he was too late to stop XANA from rebelling. In a Season 4 episode revolving around an upgrade to William's clone, Jérémie reveals that XANA's original algorithms, if used on other A.I., could induce this in them.
  • Invincible Villain: He doesn't get any real victories during the first two seasons aside from binding Aelita to him via stealing her memories at the end of Season 1, but thanks to the Enforced Cold War, the Lyoko Warriors were in no position to Cut the Juice and actually defeat him. He truly becomes this when he steals the Keys to Lyoko from Aelita, escaping the supercomputer and infecting the entire global network. His newfound power makes his attacks deadlier than ever, and the Lyoko Warriors have no way to stop him until the Skidbladnir is created in Season 4... and even then the discovery that XANA's resources far surpass their own makes their intended strategy of destroying his supercomputers impractical. Even the program specifically designed to kill him requires more energy than the supercomputer can supply, and it takes Franz Hopper sacrificing himself to finally launch it.
  • Leitmotif: "XANA Attack". It gets remixed several times.
  • Manipulative Bastard: Though he has issues understanding emotions, he is still smart enough to develop various schemes based on emotional manipulation. As the series progress, he gradually becomes better at it, eventually going near to the Magnificent Bastard level.
  • Master Computer: In Seasons 1-2, he's limited to Lyoko's. He gets out by Season 3, and proceeds to become this for hundreds of such computers around the world.
  • Noble Demon: Tends to change a lot Depending on the Writer, but XANA will occasionally display noble behavior:
    • After teaming up with the Lyoko Warriors against the common threat in "Marabounta", they expect him to turn against them. His monsters instead politely bow to them before retreating without any fight. Jérémie doesn't get the same respect in the next episode, though.
    • Similarly, in "Ultimatum", when he attempts to blackmail the Lyoko Warriors into delivering Aelita to him by taking Odd and Yumi as hostages, he shows concern with keeping them alive and warm. He also doesn't kill them until it's become clear that Jérémie refused, despite having them at his mercy.
    • XANA doesn't go out of his way to kill bystanders; whenever his polymorphic specters encounter someone (ie Principal Delmas in "Double Take", Milly and Tamiya in "Opening Act") bumping into his plans, XANA merely scares them off or knocks them out (though, if they take a more active role, he will revoke this courtesy). He used to exhibit this same courtesy to Jeremie, like in "Final Mix", but that was before he grew to despise him.
  • No-Nonsense Nemesis: Once his attacks start up, he does not pull his punches in either causing as much destruction as possible or fulfilling his objectives. The fact that he's The Voiceless means that he doesn't bother wasting his time with say, a Breaking Speech or a Motive Rant unless his plans specifically require them. And when he IS talking or having his minions speak, it's usually WHILE they're still doing their job, so he's clearly capable of multi-tasking.
  • Nothing Is Scarier: Seriously. The heroes are fighting an enemy trying his best to kill them who they never see, who rarely communicates with them. Still, he's obviously there, and it can clearly be terrifying at times. (Although, the one he did confront them personally, it was even scarier, and his more direct manifestations are nothing short of terrifying.)
  • Pragmatic Villain: Such as in "Marabounta" where he teams up with the Lyoko Warriors to destroy the title Marabounta, not to save the Lyoko Warriors, but to save himself and Aelita, since XANA needs her memory to escape the Supercomputer. Also shown in "Hot Shower" where he destroys the piece of a comet he was going to use to destroy the factory and the Supercomputer, not out of pity, but because Aelita was devirtualized from Lyoko and he needed Aelita alive and on Lyoko to lure out Franz Hopper.
  • Reality Warper: His capabilities with the towers are practically unlimited — he's shown himself capable of summoning blizzards, reversing gravity, creating sinkholes, possessing people/animals/inanimate objects, and in some cases outright ignoring physics (like making a teddy bear somehow grow to Kaiju proportions). And like Aelita, he can change the environment on Lyoko (such as summoning a sandstorm in the Desert Sector, or skewing gravity), although he doesn't do this often.
  • Red and Black and Evil All Over: His symbol is a red eye on a black background, his pulsations in Lyoko are red, and his manifestations in the real world are black/dark-grey.
  • Sealed Evil in a Can: The Supercomputer being the Can. Though it only truly imprisons him when you shut it down; when active, it still prevents him from escaping, but not from wreaking havoc.
  • Sliding Scale of Robot Intelligence: Nobel (to maybe Godlike by Season 4).
  • Soul Jar: His Replikas' supercomputers in season 4 serve as this to him.
  • Stalker Without a Crush: He follows the main gang, learning vital information about them in order to manipulate their feelings and behavior to his advantage.
  • Taught by Experience: At first, his attacks were for the most part, random disasters that never really served a greater purpose. Thanks to the fact that he got stronger and smarter from each usage of the Return to the Past, he began to learn from each of his mistakes, becoming a much deadlier manipulator and setting up clear goals for himself.
  • Turned Against Their Masters: He's been trying to kill his creator for the better part of 10 years.
  • Ultimate Evil: Besides the Faceless Eye, he never uses any kind of Lyoko form, and the closest thing to a physical form that he has in the real world is as a massive billowing cloud of slimy, black smoke.
  • Villainous Breakdown: Has one toward the end of Season 1, in the episode "Ghost Channel", where the above quote comes from.
  • Villainous Rescue: He unexpectedly helps the heroes against the Marabounta in "Marabounta" and saves William from the Digital Sea in "Final Round" after Lyoko's destruction in order to turn him into his Dragon.
  • The Voiceless: With the exception of the parts in "Ghost Channel" where he impersonate Jérémie and "Franz Hopper" where he seemingly expresses himself through Hopper's clone, we never hear him talking. And even then, it's unclear if it is actually him talking.
  • Xanatos Gambit: Any of his plans involving massive damages or witnesses in the first two seasons can be considered as such: even if the Lyoko Warriors successfully stop his attack, they are forced to use the Return to the Past to erase the event, making XANA stronger in the process.

    Lyoko Monsters 
https://static.tvtropes.org/pmwiki/pub/images/monster_8767.png
Polite, efficient, deadly... for the most part.
Lyoko Monsters

The dozen or so models of virtual monsters that XANA uses to defend activated towers and other important locations on Lyoko:

  • Guardians (Gardiens) — Not actually monsters, but force fields designed to trap a victim on Lyoko while XANA confused the heroes with tangentially-related real-world shenanigans. Used twice in Season 1 and shelved afterwards.
  • Roachstersnote  (Kankrelats) — As close to The Goomba as you'll get from XANA, these mollusk-like critters have a basic design: legs, a laser cannon housing, an Eye of XANA on its carapace and little else. They often make up for their lack of individual strength with Zerg Rush tactics; their small size also allow them to hide and act as snipers. The first of two monsters to be fielded in the real world (in "False Start"). Quickly evolved into the Plucky Comic Relief among the monsters with their tendency for being Too Dumb to Live. However, even as late as the third and fourth seasons, they still occasionally devirtualize a Lyoko Warrior, particularly Yumi in one case (having popped out from behind a rock). Notably the only monster to have one and only one attack; they have a basic laser shot, but unlike all other monsters, they don't have some sort of special attack.
  • Hornets (Frelions) — The Airborne Mooks of Lyoko, looking like giant wasps with ten wings. They fly around, shoot lasers from their stingers, drip acid at close range (only in Season One), and make the Lyoko Warriors suffer for not having a dedicated anti-air weapon.
  • Bloks — Walking cubes slightly taller than one of the heroes, supported on six crustacean legs connected to an underslung base. The four side faces are marked with Eyes of XANA on white hemispheres — one is the actual weak point, while the other three fire lasers, ice rays, and rings of fire respectively. The ice rays can paralyze the targets or devirtualize them if they're low on Life Points. The fire rings are the least often used, though both Ulrich and Odd got devirtualized by them in "The Secret". Notably, they seem to be more intelligent than the other monsters; ambushing Lyoko Warriors by using their gripping legs to hide on the sides of cliffs, for example.
  • Krabes — These four-legged, lanky six-eyed beasts deliver powerful laser attacks from both their eye arrays and underbellies. They sometimes also try to skewer the heroes with their pointy legs. Krabes are the first monster type to be deployed en masse ("The Chips Are Down", in which a line of several dozen guards the tower) and the second (and final) type to be deployed on Earth ("A Bad Turn").
  • Megatanks (Mégatanks) — A deathly powerful area denial weapon, these things consist of an arc-laser emitter cocooned within two indestructible shell halves which expand and contract to allow firing, connected by hydraulics and flesh. Their attacks are powerful enough to destroy Towers with enough concentrated fire (as attempted during Aelita's first transfer out of Lyoko in "Code: Earth"), but can be resisted with a couple of the Lyoko Warriors' weapons. They also move very fast by closing their shell and rolling on themselves, not hesitating to crush any unlucky hero in their path. They don't seem to have brakes, though, and often go flying off the Sector if they start to charge.
  • Tarantulas (Tarentules) — XANA's apparent first attempt at min-maxing its monsters: they have more Life Points than any other monster barring the Scyphozoa (as of its Season 2 rollout), the Eye of XANA weak point is small and located at the back of the head, and their mobility is largely sacrificed for high-speed firing of the laser cannon stubs on their arms. Their threat at first was immense, as a single one devirtualized every Lyoko Warrior in one go; later though, the team has learned to deal with them, and they aren't nearly as dangerous.
  • Scyphozoa (la Méduse) — XANA's first Dragon, looking like a levitating giant jellyfish. It eschews direct attacking for wrapping its tentacles around Aelita and attempting to crack her Neuro-Vault open. Other notable targets include Yumi (to force a variant Friend or Idol Decision by making Aelita transfer her own materialization code to replace Yumi's deleted version), William (to make him the new Dragon), and the Skidbladnir (to sabotage its shield regeneration). It normally retreats when it is rendered unable to gain what it came for, only being destroyed once in "The Lake" when it is overloaded, but XANA just makes another.
  • Creepers (Rampants) — Worm-like monstrosities that inhabit Sector 5 exclusively, where they Wall Crawl at will. The unique laser cannon in their mouth is more powerful on average than those of other monsters. Notable for being one of the few enemies that explodes in a large quantity of Ludicrous Gibs.
  • Mantas — White-and-blue manta rays that "swim" through the air and shriek like hawks. As if XANA didn't have enough air superiority, these Giant Flyers hatch from the Celestial Dome surrounding Sector 5 and can deploy practically everywhere to shoot the regular lasers or poop deadly multi-terrain mines. William gains a black one as steed when under XANA's servitude.
  • Kongres — Eel-like monsters that antagonize the heroes in the Digital Sea. Have More Teeth than the Osmond Family.
  • Sharks (Rekins) — Shark-like monsters also native to the Digital Sea. Fire torpedoes instead of lasers.
  • Kalamar — Only seen once in the Digital Sea, it attempted to drill through the Skid's hull.
  • Kolossus (le Kolosse) — XANA's last-minute Giant Mook, appearing as a towering Lava Golem with a blade for a left arm. It foregos standard lasers to crush the Lyoko Warriors and the Skidbladnir with sheer physical power. It is harder to kill than most monsters, having two Eyes of XANA that must be hit simultaneously to destroy it.
  • Video-game monsters — The Volcano Replika and other locales in the Code Lyoko video games give XANA several extra additions to its bestiary, from lanky Insekts to hardy Volcanoids to the first DS game's Final-Exam Boss Scorpion.

  • Artificial Stupidity: The monsters occasionally commit ridiculous mistakes, sometimes even shooting each other. This is lampshaded in "Marabounta", where Odd, while giving instructions to some of the Blocks XANA sent to help them against the Marabounta, mentions that "the only thing stupider than one Blok is two Bloks". In many respects this seems to be due to being somewhat literal-minded and overly obedient. They stick to their given goal or objective even when it's clear that isn't working. For example, when given the task of forming a firing line between the enemy and an activated tower, they do exactly that but are at a loss for what to do when the line is broken or when the enemy receive vehicle support that make them capable of going over the wall. Or as mentioned below, when ordered to search for and destroy the Lyoko Warriors, they continue to do so even if it prevents them from meeting a much worse fate like falling into the Digital Sea.
  • Attack Its Weak Point: No matter how much life points they have, it is possible to kill them instantly if you manage to hit the part of their body marked with the Eye of XANA. The only known exceptions to this rule are the Kolossus (you need to hit on both of his two marks) and the Scyphozoa (who does react and fly away when hit, but doesn't die).
  • Convulsive Seizures: Most monsters shake violently before dying. The Scyphozoa squirms in agony when it absorbs junk data, like when it took the memory from Aelita's clone.
  • Defeat Equals Explosion: They explode upon dying, although the conflagration is unharming to others.
  • Demoted to Extra:
    • The Megatanks got hit with this during Season 4, only appearing in two episodes. This was probably due to their One-Hit Kill lasers being a Story-Breaker Power concerning the Replika plotline, which was displayed in Episode 73, where their firepower was enough that Jérémie had to reroute energy from the supercomputer itself just to make sure that the Skidbladnir wouldn't be instantly destroyed.
    • The Hornets would also suffer from this during Season 4, only appearing in three episodes (79, 81, and 83), and were replaced by the Mantas whenever an aerial monster was needed.
  • Does This Remind You of Anything?: Some of the monsters's weapon design clearly evokes... bodily processes. Mantas excrete their flying landmines through a visible orbicular hole in their rear end, Krabes fire their vertical lasers from between their legs, and Hornets can squirt liquid from their lower body stingers.
  • Epileptic Flashing Lights: Whenever they're wounded.
  • Frickin' Laser Beams: All monsters, with the exception of the unique ones (Scyphozoa, Kalamar, Kolossus), primarily attack that way. Apart from the Kankrelats, though, they all have unique methods of attack as well.
  • Harmless Freezing: The Blok's ice beam can be fired in a continuous stream and freezes targets in place, but is otherwise weaker than the basic laser. They are smart enough to capitalize on its strengths however, as a Blok once froze Yumi's hands while she was performing cartwheels, leaving her completely defenseless.
  • Hit Points: Unlike the Lyoko Warriors, who all have 100 Lifepoints, the monsters all have varying amounts. Tarantulas have the most, while Kankrelats have the least.
  • Imperial Stormtrooper Marksmanship Academy: They do gets some shot to the heroes, and even sometimes succeeds in devirtualizing them, but most of the time, they miss their target, especially when said target is Aelita.
  • Implacable Man: The Scyphozoa stalks its victim relentlessly and cannot be destroyed, only temporarily incapacitated.
  • The Juggernaut: The Kolossus is huge, powerful and pretty much unstoppable by conventional means. Even a program that dropped its bottom half into the Digital Sea barely fazed it. The only way to kill it, which Ulrich figured out in the next to last episode, is to strike the Eyes of XANA on its face and arm simultaneously.
  • Nice Job Fixing It, Villain!: It has happened for the monsters to keep firing on a hero about to fall in the Digital Sea — thus saving him or her from being stuck by timely devirtualization.
  • Mecha-Mooks: Well, mecha-and-flesh mooks. Or just something completely different — XANA is suprisingly creative in design for an AI program.
  • No Body Left Behind: They explode when killed and don't even leave a trace.
  • Playing with Fire: Bloks can shoot fiery rings which usually cause a One-Hit Kill.
  • Powers as Programs: Justified, since they literally are programs. XANA is able to manipulate them exactly in that fashion: downloading them, modifying them, copying them, etc.
  • Robo Cam: They apparently see through the XANA eye, with the exception of Tarantulas, who seem to see through the little red slits on their nose.
  • Sliding Scale of Robot Intelligence: Bricks (except the Scyphozoa). Bloks seem to have some degree of intelligence, curiously enough, as they have been seen glancing at one another and emitting confused noises when a Lyoko Warrior evades them, and ambushing them from unexpected angles.
  • The Speechless: They do not seem to have human intelligence, and do not speak beside shrieking, roaring or other unintelligible sounds.
  • Super Drowning Skills: With the exception of the Kongres, the Sharks and the Kalamar. Justified though, since this is Lyoko, where falling in the Digital Sea equals being disintegrated for them. Landbound monsters can sink in ordinary bodies of water that you can find on the Ice Sector, but as they are designed to work in land, their performance in water tends to be disastrous.
  • Top-Heavy Guy: The Kolossus has short, stubby legs compared to its massive upper body.
  • We Have Reserves: XANA can create as many of them as he wants, so he has no qualm about sacrificing them if necessary.
  • Xtreme Kool Letterz: Most of their names are normal words in French and English, just modified with these to make them look cool. Kankrelat, for example, is just the French word for "cockroach," except with all of the "Cs" replaced with "Ks". Justified since Odd's the one who named them and everyone just ran with it.

    Specters 
https://static.tvtropes.org/pmwiki/pub/images/specter_9774.png
Will not disrupt household appliances.
Specters

Artificial smoke-beings created by XANA through an activated Lyoko Tower to cause havoc on Earth. At first they were only able to take control of inanimate objects or machines, but as XANA gained in power they started taking over animals or even humans. The possessed ones (often labeled as "XANAfied") can be recognized by the XANA symbol in their eyes. The Specters confer them some special powers, like Nigh-Invulnerability (they can still be knocked out if taken by surprise, and are vulnerable to electricity or EMP), Super Strength, Wall Crawl, Shock and Awe... and others as the series progresses. Alternatively they can control many animals or people, but then fewer special powers are gained because XANA's energy is diluted.


  • Body Snatcher: If they possess someone.
  • Glamour Failure: If their victims reveal XANA's eye.
  • Hulk Speak: Sometimes; some of them have been shown to be perfectly able to deliver real sentences. Most often, it just seems like XANA doesn't feel like wasting time to make them talk, only doing so if it is deemed necessary.
  • Intangible Man: Part of what makes them so hard to fight in the real world is how often they pull this trick.
  • Mind-Control Eyes: XANA's eye, to be specific.
  • Nigh-Invulnerability: Only EMPs and other electrical forces can actually damage them, and even then, it just knocks them out temporarily. So far, only Ulrich and William succeeded in permanently putting them down.
  • Robo Cam
  • Shock and Awe: They can use electricity, and don't hesitate in the slightest to do so by shocking their targets.
  • Sliding Scale of Robot Intelligence: Monkey to Average-Joe, depending on the attack. Jim was notably talkative during both of his possessions, while others like Yolanda and Delmas merely grunted.
  • Speed Echoes: Delmas displayed this when under their control once.
  • Super Strength: Barely anything can really stop them. If they don't phase through an obstacle, they utterly destroy it.
  • Voice of the Legion: Everyone under their control gains a demonic, electric reverb.
  • Walk on Water: On occasion.
  • Wall Crawl: Nicholas and a delivery-boy displayed this ability once.
  • Wetware Body: If they snag a biological host. They have a wide variety of choice: rats, wasps, wolves, humans... the list is as long as the number of living organisms on the planet.
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    Polymorphic Clones 
Polymorphic Clones

An advanced form of XANA's Specters, the Polymorphic Clones have no need for a host and can take a human shape by themselves. They can copy many appearances, most often of the Lyoko Warriors or some adult to sow division or attack by surprise. They have the same powers as a XANAfied human with the addition of shapeshifting. They solely appeared on Earth, with the exception of one going to Lyoko through a scanner by replacing Odd in the episode "Revelation". Jérémie mastered the technology in Season 4 to create a short-lived clone of himself, and then a replacement for William. Both of Jérémie's clones, however, have a strange programming flaw: their personalities are partially inverted compared to the originals. The Jérémie Clone is an insufferable Odd-like Kid-anova, while the William Clone is dumb as a sack of bricks.


  • Artificial Human: According to Clone William, a polymorphic specter is a "digitally generated polymorphic energy field controlled by a non-evolving, basic, behavioral program" that takes the form of a human being.
  • Characterization Marches On: The prototype Clone in season 1 couldn't shapeshift and was rather terrible at impersonating Yumi, blowing its cover rather quickly. By season 2, XANA seems to have perfected them, and they are more than capable to fool not only the civilians, but also sometimes the Lyoko Warriors themselves.
  • Doppelgänger: Done frequently to deceive the Lyoko Warriors, often resulting in a Mirror Match.
  • Glamour Failure: If you catch their Hellish Pupils.
  • Foreshadowing: The Polymorphic Clones technically didn't appear until season 2, but season 1 had an episode where XANA did try something of a prototype by sending a Specter assuming the appearance of Yumi on Earth while the real Yumi was kept inside a Guardian.
  • Hard Light: They are energy beings given a body. Specters can become solid or intangible at will.
  • Hellish Pupils: Would you consider XANA's symbol to be anything less than this?
  • Hulk Speak: Averted; most Polymorphic Clones that have been seen can articulate perfect sentences if needed, and just growl while fighting.
  • Intangible Man: They're usually solid, but can become intangible along with a blur of static, letting physical blows just go through them.
  • Kiss Me, I'm Virtual: XANA's first perfected one went around making out with people on campus in an attempt to drive a wedge into the group. It worked on Aelita due to her lack of social skills at the time, but everyone else managed to figure out the trick after the initial shock.
  • Master of All: While possessed humans can be knocked out with some effort, a polymorphic specter is pretty much an unstoppable Implacable Man that keeps getting New Powers as the Plot Demands. They can even be sent into Lyoko, where they freely shapeshift into any avatar registered in the Supercomputer.
  • Nigh-Invulnerability: Barely anything can keep these things down for long. Electrical impulses seem to work the best, but even that's temporary. They can only be stopped if the tower powering them is shut down.

Kadic Academy

    In General 

    Élisabeth "Sissi" Delmas 
https://static.tvtropes.org/pmwiki/pub/images/sissi_6286.png
Élisabeth (Elizabeth) "Sissi" Delmas

"I'm the star, the diva of the school!"

Voiced by: Carole Baillien (French), Jody Forrest (English), Gaby Ugarte (Latin American Spanish, Seasons 1-2), Adriana Núñez (Latin American Spanish, Seasons 3-4), Cristina Yuste (European Spanish)

Daughter of Kadic Academy principal Jean-Pierre Delmas. She can have practically any boy at school — but she wants Ulrich, who'd rather have nothing to do with her despite (or maybe because) they'd known each other since childhood. To separate Ulrich from Yumi (not that they're actually together, honest), Sissi makes a variety of attempts to undermine the bonds of friendship between the Lyoko Warriors. These often manifest as attempts to administratively separate them through her power as a one-girl Absurdly Powerful Student Council or the use of blackmail material to buy her way into the group. Either way, she has the potential to sow a greater division than XANA himself. The prequel two-parter "XANA Awakens" reveals that she had initially been in on the Lyoko Warriors' secret, but her memories of the Supercomputer's activation were wiped with a RTTP because she notified her father due to thinking her friends were in danger and a misunderstanding of betrayal occured. Hints dropped from late Season 2 and through Season 4 seem to reinforce Fanon that Sissi could be perfectly content with Odd — so long as she doesn't realize it's a Bohemian like him that she connects with.


  • Abhorrent Admirer: A toned-down example toward Ulrich; unlike the usual, he doesn't reject her because she is ugly (she is actually quite attractive), but because he feels she is a Brainless Beauty and an extremely annoying Stalker with a Crush.
  • Absurdly Powerful Student Council: A one-person version, solely by virtue of being the principal's daughter.
  • Action Survivor: Just try to count the numerous XANA attacks she was directly involved in that she survived.
  • Alpha Bitch: Though becomes a Lovable Alpha Bitch through Character Development.
  • Bare Your Midriff: She wears a belly-shirt everywhere.
  • Bathing Beauty: She is said to take up to three showers a day, and she spends lots of time in them.
  • Big Sister Instinct: As often as she picks on them, Sissi is actually very protective of Milly and Tamiya during XANA's attacks. "Attack of the Zombies" makes a point of this.
  • Brainless Beauty: Or so she comes across; she's actually smarter than she seems.
  • Bratty Teenage Daughter: To Principal Delmas. The poor man is just a little too good-natured to really do anything about it.
  • Butt-Monkey: She has awful luck, and everyone seems to dislike her to some extent. But she mostly brings it on herself.
  • Catchphrase: "Cretin(s)!"
  • Character Development: Becomes a progressively better person throughout seasons 1, 2, and 4 (not so much season 3.)
  • Characterization Marches On: In many of the earlier Season 1 episodes scripted (though aired out of order), she was very malicious and more effective in her manipulation and antagonism. But then the writers decided to soften her, and she became the bumbling comedic ditz that we're all familiar with.
  • Clingy Jealous Girl: Where Ulrich is concerned. It annoys the hell out of him, since they're not together and it gives people the wrong idea.
  • Defrosting Ice Queen: She's way more openly antagonistic to the main group in Season 1. Come Season 2, she's warmed up to them quite a bit.
  • Demoted to Extra: In Season 3 and 4, especially 3 (she becomes relevant again late into Season 4).
  • Depending on the Writer: The level of sympathy her character is treated with changes from episode to episode; shown moreso in Seasons 2 and 4 (where she was sympathetic in the majority of her appearances) than 1 and 3 (where she... wasn't, though she did have moments in 1 and Season 3 saw her Demoted to Extra). Her level of intelligence also varies. While in Seasons 1 and 4 she can be very smart, she's mostly shown as stupid in the prequel and seasons 2 and 3.
  • Do Not Call Me "Paul": "It's Sissi! Not Élisabeth!"
  • Dungeonmaster's Girlfriend: She ends up playing this role whenever she joins the party, even though she's not romantically involved with any of them.
  • Friendly Enemies: She and the gang are mostly very civil and casual with each other throughout Season 4. It only stops (temporarily) toward the end when her old suspicions consume her again.
  • Green-Eyed Monster: She's insanely jealous of Yumi due to Ulrich's crush on her and her general status as The Ace.
  • Hidden Depths: More and more episodes show this as the show goes on, particularly how surprisingly selfless she can be during XANA attacks, very often helping other people even at risk to herself. Even the misunderstanding that got her kicked out of the Lyoko gang was based upon frantic concern for their well-being.
  • Hopeless Suitor: Even before Yumi entered the scene, it was clear Ulrich had no interest in dating her.
  • Hormone-Addled Teenager: She's a little too amorous for her age, even.
  • Informed Attribute: Stated by Ulrich to be a Dude Magnet in the prequel; however, the number of boys seen actually hitting on her onscreen doesn't exceed three (two of them being Odd and Hervé, and the third being a one-shot character who forgot about her as soon as he saw Yumi), and minor characters have been shown to be pretty aware of her being a Brainless Beauty. In fact, Yumi technically gets more attention from boys than she does.
  • It's All About Me: Her usual attitude, though see Hidden Depths above.
  • Jerk with a Heart of Gold: She's a bratty, self-absorbed snob, but she's a decent person deep down. And she does genuinely care for Ulrich, even if she has a funny way of showing it.
  • Little Miss Snarker: She can't say two sentences without something snarky coming out.
  • Lingerie Scene: She's in her underwear about as often as Yumi is in the bathtub.
  • Love Dodecahedron: She is in love with Ulrich, who has feelings for Yumi, who is also the main love interest of William.
  • Missing Mom: Word of God states that Sissi's mother is alive, but lives away from Sissi and her father. She is never seen or mentioned in the show.
  • Ms. Fanservice: When she's not in a Lingerie Scene, she's dressed to play this to the hilt.
  • Only Known by Their Nickname: Only adults ever call her "Élisabeth", and she hates that. Everybody else calls her "Sissi".
  • Out of Focus: From Season 3 up until near the end of Season 4 (when the gang's suspicious activities increases to such a level that she can't ignore it anymore).
  • Screaming Woman: Played straight when she's confronted to XANA's latest attack. Parodied in "End of Take", where "AAAAAHH" is her sole line in James Finson's movie.
  • Ship Tease: With Odd, particularly in Season 2's "Déjà Vu" and Season 4's "Kadic Bombshell" and "Bad Connection".
  • Skirt over Slacks: In Seasons 1-3 this is her standard outfit.
  • Spoiled Brat: Her father is a huge pushover where she's concerned, which she takes advantage of mercilessly.
  • Stalker with a Crush: Her crush on Ulrich tends to verge on this, as in some episodes she is willing to resort to things like blackmail and taking advantage on his Laser-Guided Amnesia to get him to date her. The fact she has apparently been trying to seduce him since Nursery School, even though he never returned the affection, doesn't help. This tends to be toned down after her Character Development.
  • Throw the Dog a Bone: On occasion, and in the final episode, when the gang at last decides to make her an "official" friend. Also counts as Earn Your Happy Ending, as it feels like an ultimate reward for all the multiple times she's helped out but doesn't remember.
  • Tomboy and Girly Girl: A rival (sort of) case with Yumi.
  • Unknown Rival: Yumi is mature enough to realize that Sissi is a Hopeless Suitor, and thus a rivalry between them is barely acknowledged on her part.
  • Unlucky Childhood Friend: She knows Ulrich and has a crush on him since Nursery School. Though the "friend" part remains unconfirmed, seeing how Ulrich didn't seem in good terms with her in the prequel.

    Jim Moralès 
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Jim Moralès

"Actually, I'd be glad to talk about it, but I don't have the time!"

Voiced by: Frédéric Meaux (French), David Gasman (English), Luis Alfonso Padilla (Latin American Spanish, Seasons 1-2), Jorge Ornelas (Latin American Spanish, Seasons 3-4), Cholo Moratalla (European Spanish)

The Gym teacher and dormitory supervisor at Kadic Academy. A bit overweight and prone to speeches full of redundancies and malapropisms, he's most often the comic relief. But when things get dangerous he can prove extremely courageous and fiercely protective of the children. Jim is sometimes the butt of the students' practical jokes, and as a result can be overly severe toward them. He's very suspicious of Team Lyoko, and ends up discovering the Factory several times, to have his memory erased by the Returns to the Past. Starting with Season 2, whenever appropriate to the situation, his shtick is to mention one of the many jobs or hobbies he's supposed to have done in the past, from sewer worker to astronaut.... Though some of these might be true, most are probably wild exaggerations, as suggested in the episode named for his Catchphrase.


  • Badass Teacher: He doesn't appear to be one at first glance, but he can be.
  • Butt-Monkey: Even more so than Odd and Sissi, being subject to physical comedy at his expense as much as verbal comedy.
  • Catchphrase: "I'd rather not talk about it," when referring to the various jobs he had.
  • Cloudcuckoolander: Even if he tries to present himself as a strict teacher, he has a ton of weird quirks and takes them to heart, and isn't even aware of how people actually laugh at his back for them.
  • The Comically Serious: He takes himself very seriously. Too much, in fact, for the kind of eccentric he is.
  • Crouching Moron, Hidden Badass: Most of time, he is portrayed as goofy, clumsy and a bit stupid, to the point even the students don't take him seriously. When given the chance, however, he can actually be competent.
  • Department of Redundancy Department
  • Drill Sergeant Nasty: Apparently, he used to be one, and still has the mannerisms.
  • Expansion Pack Past: Every time he talks about his past, he's got something new to add into the mix. No word on how much of it is true.
  • Gratuitous Disco Sequence: His secret videoclip Paco Disco.
  • I Minored in Tropology: Or rather, "I was a former Navy SEAL/CIA operative/FBI agent/paranormal researcher, etc."
  • Jerk with a Heart of Gold: Brash, hot-blooded, almost always angry, but he does care about the well-being of his students.
  • Let's Get Dangerous!: On those rare occasions when he gets fully serious, he's a force to be reckoned with.
  • Multiethnic Name: Has an Anglo-Saxon first name (if Jim is short for James) and a Spanish surname (though weirdly spelled).
  • The Munchausen: Maybe. His various accounts of his previous life range from the reasonably believable to the patently ridiculous, not to mention the sum of all of them would probably require more than one lifetime to fit, but there's no actual proof that he's lying in any case.
  • Noodle Incident: Over the span of his career... too many to count.
  • Papa Wolf: The students may not actually be his children but they're his students and by golly, he's going to protect them!
  • Phony Veteran: Some of the jobs he claims to have occupied are related to the Army, the Navy or some kind of secret service, including paranormal investigation. While we are never shown any proof that Jim lies in his life tales, the possibility of a man actually having done all those things (along with the rest of his stories) is admittedly very small.
  • Plucky Comic Relief: It goes to show what kind of show this is that the old gym teacher plays this role.
  • Pointless Band-Aid: Under his left eye. He probably thinks it makes him look tough.
  • Properly Paranoid: He is firmly convinced the Lyoko Warriors are doing something behind everyone's back, an impression Delmas only sees as paranoia.
  • Real Men Wear Pink: Season 4 reveals his cellphone is pink and decorated with several hearts. Even Odd thought it was too girly.
  • Sixth Ranger: Temporarily, at the end of Season 1. But then he gets his memory erased when the gang go back in time.
  • Spell My Name with an "S": His surname is officially written as "Moralès", but some dubs spell it by the more regular form "Morales" (the difference being, respectively, "Mo-ra-LES" and "Mo-RA-les").
  • Took a Level in Kindness: In Season 1, Jim spent a lot more time trying to find out what the Lyoko warriors were hiding, which made him antagonistic to them in general, to the point of inadvertently causing Jérémie to fall down a flight of stairs. This subsequently gets a horrified Jim fired, but Jérémie decides to reveal the truth to Jim, as he was injured and needed Moralès to help. From this point forward, Jim seems to become a lot more lighthearted as a character, even after the Reset Button in the Season 1 finale. It's notable that Season 2 is what picks up on the "I'd rather not talk about it..." Running Gag.

    Hiroki Ishiyama 
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The only Annoying Younger Sibling so far.
Hiroki Ishiyama

"YUUUUMIII, your boyfriend is here!"

Voiced by: Guylaine Gibert (French), Barbara Weber-Scaff (English), Gergei Mayén (Latin American Spanish)

Yumi's younger brother, appearing in Season 2 and joining the 6th grade at Kadic at the start of Season 3. He shows some hero-worship toward Ulrich, and constantly hounds his sister to date the Stern boy and admit her feelings for him. A bit of a crook, he often blackmails Yumi into doing his homework in exchange for not tattling to their parents when she's out saving the world. Unwittingly tagging along in some of XANA's attacks, he tends to be a dangerous distraction (in "A Bad Turn"), but also shows some useful skills (like picking locks in "Hot Shower"). He never keeps memories of this thanks to the Returns to the Past.


  • Annoying Younger Sibling: His sole role seems to be teasing Yumi about her relationship with Ulrich. To say she finds this annoying would be an understatement.
  • Everyone Knows Morse: He does have an excuse for this, though; he and Yumi learned it to talk in secret at the table.
  • Remember the New Guy?: Hiroki is nowhere to be seen in season 1, even though we see the Ishiyama household a few times. Even in "Holiday in the Fog", when the family are going on vacation, Hiroki isn't seen in the car. Yet when he shows up in season 2, no-one draws attention to his sudden appearance.
  • Shipper on Deck: Of his sister and Ulrich, though it's mostly about teasing her.
  • Tagalong Kid: He's completely in the dark regarding Lyoko, but occasionally participates in helping to curb the damage XANA causes in the real world.
  • Young Entrepreneur: In Season 4, he's shown selling Subdigitals tickets. He refuses to give any discounts.

    Franz Hopper 
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Franz Hopper / Waldo Schaeffer

"Project Carthage was military program used to block enemy communication. [...] So I built the Supercomputer, created Lyoko, and last of all XANA, to destroy Carthage."

Voiced by: Arnaud Léonard (French), Paul Bandey (English, second season), Alan Wenger (English, third and fourth seasons), Víctor Delgado (Latin American Spanish), Pablo Sevilla (European Spanish)

Aelita's father, the creator of the Supercomputer, Lyoko and XANA. Also a former Science teacher at Kadic Academy.


  • Ambiguously Evil: Throughout Season 2, when the Lyoko Warriors were researching his life, it became increasingly unclear as to whether or not he is a good guy or an insane madman, with Ulrich at one point suggesting that Hopper is, in a way, a second enemy to deal with. His design for a neuronal headset nearly kills Jérémie (which is why Ulrich brought him as an enemy), Aelita's flashbacks of him are extremely ominous in presentation (even his most heartwarming moments picture him as a rather distant father), and the Polymorphic Specter of him has his personality so down pat that it can deceive a viewer (Yumi honestly thought that the clone was the real deal). Not to mention how his sanity did in fact, plummet during his research concerning Lyoko. It isn't until Aelita's memories are restored in the Season 2 finale that Hopper is confirmed to be on the side of the Lyoko Warriors, and he is firmly seen as the Big Good from that point onward.
  • Badass Bookworm: He rarely manifest in person, but when he does, it almost always result in him doing something awesome to help the Lyoko Warriors. XANA considered him enough of a threat to miss a chance to destroy the Supercomputer and Lyoko Warriors for good if that meant not being able to deal with him.
  • Ball of Light Transformation: Unlike other, rather than taking the form of a humanoid Digital Avatar, Franz Hopper is permanently virtualized on Lyoko under the shape of a large, brilliant ball of light. In a flashback during Episode 57, his form consisted of a cluster of smaller balls of light.
  • Big Good: Everything the heroes have to fight against XANA is thanks to Dr. Hopper. And he occasionally helps more directly if the situation calls for it.
  • Color-Coded Characters: The towers and monsters under his control are marked by a white aura.
  • Comic-Book Fantasy Casting: Appearance-wise, he's Philip K. Dick with added opaque glasses for extra mystery. The creators of the show are fans of him, and also used his surname for "Kadic".
  • Crazy-Prepared: He locked his journals behind such high-encrypted coding Jérémie predicts it'd take a year to break it, then hid them in a random locker with the key being in a toy doll, which itself was hidden behind a compartment in a wall in a house in the woods. Taken Up to Eleven in the novels, wherein among other things, he: manually broke apart and hid Code DOWN, bricked up an entire part of the Hermitage to hide another diary, wrote notes in invisible ink, and downloaded all his work into Aelita's brain just so she could recreate it if she had to enter Code DOWN. The man's modus operandi was basically predicting and preparing for anything that could possibly go wrong; even XANA turning on him was something he figured might happen, he just had no choice but to flee to Lyoko.
  • The Ghost: A subversion. While he does technically have an onscreen appearance as his light ball avatar, there are no scenes of him as a human that aren't part of a flashback or an imitation by XANA. Given that the mentioned avatar is silent and traitless, it can be truthfully said that the viewer never gets to see Hopper actually interact with the main cast.
  • Heroic Sacrifice: Allows himself to be killed by Mantas while he diverts enough power to the Supercomputer to launch the Anti-XANA Program.
  • Knight of Cerebus: Make no mistake, he's most certainly the Big Good, but episodes that directly involve him (In particular, his past concerning Project Carthage and The Men in Black) tend to delve into darker plot lines than normal.
  • The Mentor: He serves this function to Jérémie, helping him to refine his programming and giving him data and better weapons with which to fight XANA.
  • Mysterious Past: The specific details of his work concerning Project Carthage is never revealed, even when the show ends.
  • Non-Action Guy: Downplayed. His virtual form is not capable of direct combat, much like Aelita in the first two seasons and he's absent for most of the series. However, the data he gives to the Lyoko Warriors is critical in enabling them to continue fighting XANA, and in the end, his Heroic Sacrifice and compiling of the anti-XANA program effectively gives him more credit in defeating XANA.
  • Opaque Nerd Glasses: In life, he sported a pair of these.
  • Papa Wolf: XANA knows it, and exploits it throughout Season 4.
  • Phlebotinum Rebel: Franz Hopper created XANA to destroy "Project Carthage", which he was previously working on. Whether or not he succeeded in doing so is unknown.
  • The Professor: In a roundabout way, thanks to his diaries.
  • Properly Paranoid: He suspected agents were following him while he was working on the Supercomputer. He was right.
  • Real Name as an Alias: Waldo Schaefer, a.k.a. Franz Hopper, changed his moniker for his middle name and the maiden name of his wife.
  • Sanity Slippage: Suffered a heavy case of it during the creation of Lyoko. His abuse of the Return to the Past (He repeated the same day over 2,500 times without rest) made him extremely paranoid, as seen in his diary, as well as having a delusion of grandeur, as he called the Supercomputer his 'Great Project'.
  • Staying Alive: In the season two and four finales, he sacrifices himself for Aelita. The Season 4 sacrifice seems definitive.
  • Superpower Lottery: Like Aelita and XANA-William, he has the Annex Program. He helped and saved the Lyoko-warriors more often than not when using it, possessing Sissi to communicate with them or possessing Mantas to save the Lyoko-warriors. See Aelita's Superpower Lottery for more information on the Annex Program.
  • The Stoic: He has exactly two facial expressions: open-mouthed and closed-mouthed. It helps to present him as a deeply reserved man.
  • Transhuman Aliens: Hopper is permanently virtualized into Lyoko, and his avatar is a brilliant ball of light, rather than a humanoid like the other Lyoko Warriors.
  • Mad Scientist: He built the Supercomputer, Lyoko and XANA on his own, and lost his marbles due to the strain of his experiments.
  • Virtual Ghost: Franz never bothered taking a corporeal form on Lyoko.
  • The Voiceless: While his voice is heard on screen, it's always either in a flashback, a recording, or a XANA trick. Hopper himself (in his present-day light ball form) is never heard to speak.

    William's Clone 
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Clone William. Awwwwwww!
William's Clone

"To be specific, I'm a digitally-generated random polymorphic energy field controlled by a basic non-evolving behavioral program."

Voiced by: Mathieu Moreau (French), David Gasman (English), Alexei Mayén (Latin American Spanish), Pablo Sevilla (European Spanish)

A Polymorphic Clone created by Jérémie to replace William throughout season 4 while the latter is controlled by XANA, so that nobody at Kadic gets suspicious from his prolonged absence. The clone is close enough from the original to fool most people, although his programming isn't quite perfect, making him a Literal-Minded Ditz — and a big source of humor. Milly and Tamiya discovers something is amiss in episode "A Lack of Goodwill", and William's parents quickly find out he's an impostor (in episode "Down to Earth"), just before William's return.


  • Artificial Human: A copy made of Hard Light. It's able to simulate humanity well enough.
  • Cannot Tell a Lie: He was never programmed to lie. He'd respond truthfully to any question asked by anybody, including about his true nature — although being quite stupid and literal-minded, it's probable he'd misinterpret the question. And while he's aware another William exists, he still responds to William's name, which can cause further confusion.
  • Cloning Blues: Averted. He's not self-aware enough to care that he's just a replacement doomed to disappear when the true William comes back.
  • The Ditz: His artificial intelligence isn't quite advanced enough to make him act normal.
  • Doppelgänger: A rather... imperfect clone of William.
  • Hard Light: "Random polymorphic energy" to be precise, whatever the hell that means.
  • Literal-Minded: The most common expression of his ditziness:
    Delmas: Well, Dunbar, my boy, I am glad to see your fever has broken and you're feeling well!
    Clone William: Eh... did I break anything else?
  • Other Me Annoys Me: If the possessed William looks annoyed at the sight of his clone, it's nothing compared to what the real one discovers it did to his reputation when he's finally free.
  • Replacement Goldfish: He tends to exemplify the "Goldfish" part more than the "Replacement" part.
  • Techno Babble: The above quote.
  • Undying Loyalty: To the Lyoko Warriors, so long as XANA can't control him. He even goes so far as to try to fight the real William in one episode (not with much success, unfortunately).
  • Walking Spoiler: His very existence spoils William being Brainwashed and Crazy by XANA.
  • What Measure Is a Non-Human?: The Lyoko Warriors, with the exception of Aelita, are pretty dismissive of him; they don't really care if he gets punished and call him not a real human...even though Episode 81 shows he's starting to gain humanity. Aelita calls them on this, since they treated her like a human when they thought she wasn't.

    Kiwi 
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Kiwi

Odd's dog, which he brought secretly in Kadic and now hides inside his room with the help of Ulrich, since pets are forbidden at school. Kiwi tends to not do much besides eating, sleeping and in some occasion wreaking havoc in the room. Odd, however, is devoted to it.


  • Dogs Are Dumb: If Jérémie's opinion is anything to go by.
  • Loophole Abuse: Used in one episode, where Jim finds out about Kiwi. When pointed out that pets are forbidden inside school, Odd notices that they are in the bus at this point, meaning they are technically outside school.
  • Open Secret: Pretty much every student at the school knows that Odd is keeping him in his room in defiance of the rules; Sissi even threatens to tell on him in one episode, but apparently changes her mind later.
  • Ridiculously Cute Critter: Bordering on Ugly Cute at times.
  • Robot Me: Kiwi has a robot duplicate built by Jérémie.
  • Team Pet: To the Lyoko Warriors.

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