PogoThe protagonist of the Prehistoric chapter, "Contact". A young boy who's just undergone the coming-of-age rites of his tribe, he looks forward to becoming a hunter until he meets a strange young girl named Bel. Events lead to him being exiled, and soon he finds himself falling in love, battling a rival clan out to sacrifice her, kicking a Tyrannosaurus rex god's ass, and rejoining his tribe. He is assisted by a gorilla named Gori.
- Death-or-Glory Attack: One of the moves he learns acts like this. It deals about 800 damage on the first time it's used, but it also tends to inflict extreme debuffs, often including Power, which makes Pogo just about worthless if the enemy is still standing afterwards.
- Defeat Means Friendship: He has to be beaten in a fight before he joins in the final chapter. Unless you're Li, in which case he'll join you for free since he blushes madly over Li being a woman.
- Fartillery: One of the early attacks he learns is a fart. It can poison the enemy.
- Heroic Mime: Justified, as he's from an era where human speech hasn't been developed yet.
- Hot-Blooded: Has a tendency of rushing into battle without a second thought, and of solving most problems with fists.
- Idiot Hero: By how he acts, he probably isn't the most intelligent of the bunch.
- No, You: Thanks to the trope below, he carries his rivalry with Zaki like this.
- Precocious Crush: Bel is probably older than Pogo, but he crushes on her so badly. It ends happily. Also, if Li is the finale protagonist, Pogo will join her without a fight, completely smitten with her.
- The Unintelligible: Since he exists in a time before human speech is discovered. Although, he knows one word in the end: "Love".
- Use Your Head: To crash into the enemy head-first.
- You Gotta Have Blue Hair: Well, green hair actually.
Master of Xin Shan QuanProtagonist of the Kung-Fu chapter, "Inheritance". The only living master of Xin Shan Quan, as he feels himself drawing close to death, he descends from his dojo and seeks pupils to pass it on to. He finds three... but only one of them will carry the style onwards, and aid him with a battle against a vicious rival school.
- Can't Catch Up: He starts at Level 10, but unlike his pupils, he can't level up or gain experience. Any one of them has the potential to surpass him and master all his techniques.
- Cool Old Guy: He's even older than Sundown!
- Dead Star Walking: Although he appears in the cover, he'll not make it past his own chapter, and it's his surviving pupil who'll be in the Final chapter.
- Everyone Calls Him "Barkeep": Name not known. You do name his style, though.
- Eyes Always Shut: As part of being the Old Master.
- Hermit Guru: At first. He lives alone in the mountains before deciding to take on pupils to carry on his art.
- Martial Pacifist: Would rather perfect his art than smack down a school of punks.
- Mega Manning: He can induce this to his pupils.
- Old Master: Particularly noticeable when you compare him to the younger Odi Wang.
- Passing the Torch: Sort of, but becomes Take Up My Sword when the Master dies just after the final battle, where his pupil thoroughly kicks Odi Wang Lee's ass.
Yuan JouPossible inheritor of the Xin Shan Quan style. A Street Urchin forced into robbing thanks to a gang leader, but actually a rather shy and compassionate boy.
- Glass Cannon: Good in a lot of stats, but his health is puny at first.
- Nice Guy: He won't even ask for anything to join the final team, unlike Li or Sammo.
- Shrinking Violet: A male example. There's a scene where he complains that he's not as good as Li or Sammo... as he's beating his way through Odi's goons.
Li KuugoPossible inheritor of the Xin Shan Quan style, and possibly the sole female protagonist of the game. A bandit living in the forest, and an overall impulsive girl constantly looking for a fight.
- Defeat Means Friendship: The Master has to beat her up to make her follow him, and she has to be beaten, no question, to join the final party.
- Good Scars, Evil Scars: She has a cross-shaped one on her face, and while she's definitely a rowdy girl on the outside, she's a good girl inside.
- Not So Different: When picked as the finale protagonist, she will remark that Oersted reminds her of her past self.
- The Smurfette Principle: Largely averted — she can be the only female protagonist, or she can end up dead, when not chosen as the star pupil — and the game doesn't use the usual 'only girl' tropes with her.
- Spell My Name with an "S": Kuugo is constant. But Li, or Lei?
- Tomboy: Li speaks very roughly, but is genuinely surprised when she's called a 'girl' by Yuan and Sammo.
Sammo HakkaPossible inheritor of the Xin Shan Quan style. A portly bum who spends most of his time dining and dashing... which has given him incredible reflexes.
- Acrofatic: Not initially, but just by being the Xin Shan Quan inheritor at the end.
- Big Eater: So much that you have to feed him in the final chapter to get him to join.
- No Celebrities Were Harmed: With a fat stature like that and that name, he is definitely based on Sammo Hung.
OboromaruProtagonist of the Bakumatsu chapter, "Secret Orders". An untested ninja, he's sent into the castle of a tyrannical samurai on a secret mission: to rescue a valuable person and prevent Japan from falling into constant warfare. How he does so is up to him.
- Anime Hair: Courtesy of Goshow Aoyama. Oboromaru actually looks a bit like Shimamura Joe in his official artwork◊, in fact.
- Invisibility Cloak: Is given one just before the start of his chapter.
- Katanas Are Just Better: His weapons. Depending on how you finish his story, you can even get a really nifty one too!
- Ninja: And not a highly visible one, either.
- Pacifist Run: Can opt to do so in his scenario. Doing so will impress Ryoma.
The Sundown KidProtagonist of the Wild West chapter. Once a prodigious gunslinger, one of his duels involved a group of outlaws, and soon what followed cost him his very hometown and everyone he held dear to their wrath. Because of this, he put a bounty on his head and vanished, looking for death to make amends for the grave tragedy he accidentally caused, except no one was able to take that bounty. He stopped by a village, saved them from the wrath of a bandit gang, and slowly opens up, being reminded of what it's like to protect the innocent.
- Cool Old Guy: Will probably become the oldest character in the Final chapter, since the Old Master of Xin Shan Quan wouldn't be around.
- Death Seeker: Why he put up that bounty on his head.
- Glass Cannon: Sundown has a very low HP score. But some of his techniques can often cause 999 damage.
- The Gunslinger: In the Clint Eastwood style.
- Ironic Name: Sundown "Kid". He's the oldest of the main characters. At least of the ones to survive until the final chapter.
- Nice Hat: And a poncho too!
- The Stoic: He doesn't speak much. In fact, Visible Silence is like his Verbal Tic.
Masaru TakaharaProtagonist of the Present Day/Wrestler chapter, "The Strongest". A young mixed martial artist, his only goal is to be the strongest man in the world. In order to test himself, he's picked out six of the most powerful fighters on the planet. Unbeknownest to him, there's a seventh one keeping an eye on his progress...
- All Your Powers Combined: Spoken in verbatim before his confrontation with Odie.
- Defeat Means Friendship: He'll ask your protagonist to fight him in the final chapter before he joins, even if you declare you're not his enemy. Except if your protagonist is either Sundown or Cube.
- Expy: Could be intentional, but he probably has a lot similarities with Ryu. Not just the headband and the desire to be the strongest, he also carries a similar bag. Appearance-wise, he also has some similarities with Domon Kasshu without the Anime Hair.
- Hot-Blooded: He doesn't look like it, and looks more like The Stoic. But once Odie reveals how much of a scumbag he is... he goes nuts and reveals his inner hotblood.
- Martial Arts Headband: Has this, and you'd think it'd be equipment too.
- Magikarp Power: When entering the Final Chapter, he starts out as Level 2 due to how his scenario works (Masaru don't need no wussy experience points, fool). Due to this, his stats may be weak at first, and you'll need to grind a little. However, he has great stat growth as he racks up levels. See Stone Wall.
- Taken to an extreme with his boss rematch. In the original fight, Odie Oldbright is one of the tougher bosses, since he hits rather hard and you have no way of leveling up Masaru. Get him to level 16 or higher in the final chapter, and in the rematch Odie does around 1 damage to him.
- Mega Manning: He can learn skills by being hit with them in his scenario.
- Stone Wall: His HP score shoots like crazy, making him easier to reach 999 HP with. He can also have shades of Lightning Bruiser, as he's not exactly slow and weak either.
- Suplex Finisher: German Suplex. He can stun people with it.
- To Be a Master: Emphatically wishes to be the strongest through experience and knowledge rather than just winning his fights, and so contrasts violently with Odie Oldbright, who just wants to be at the top.
- Walking the Earth: What he usually did, after he's done with a certain area of fighting.
- Weak, but Skilled: Masaru epitomizes this when you first find him/play as him in the final chapter.
- Wrestler in All of Us: Zig-Zagged. Masaru's chapter is referred as 'Wrestler', however, he's a mixed martial artist, being able to absorb Muay Thai and Sumo moves as well as Japanese martial arts moves. It doesn't stop him to get some wrestling moves like the German Suplex or Frankensteiner...
Akira TadokoroProtagonist of the Far Future/Mecha chapter, "Flow". A psychic who grew up in an orphanage, he spends his free time fighting off biker gangs. The local mad scientist Dr. Toei, however, suspects his destiny lies with the giant robot known as Buriki Daioh... and his past may have something to do with the "liquified humans" plaguing the city...
- Aloof Big Brother: To many of the orphanage kids.
- Badass Biker: Eventually becomes one, succeeding the deceased Matsu.
- Covert Pervert: Akira isn't above asking one of the orphans to give him Takeo's panties.
- Good Scars, Evil Scars: Like Li, he sports a cross-shaped one in the face, and he's sort of a Troubled, but Cute guy.
- Hot-Blooded: Considering his scenario is a spoof of Hot Blood Mecha Anime, it comes in the parcel.
- Psychic Powers: His main draw, from reading minds to summoning a lot of attacks, to eventually piloting Buriki Daioh. They cover wide swaths of the battlefield, but are overall a little weak for the final chapter.
CubeProtagonist of the Sci-Fi chapter, "Mechanical Heart". A robot, recently created by Kato, engineer of the spaceship Cogito Ergosum. As the ship approaches Earth, Cube must determine just what... or who... he is, and must face a threat not only to himself, but to the ship's mission.
- BFG: Maser Cannon. It's pretty powerful but takes a while to charge.
- Cephalothorax: Just a head on tank treads, really.
- Combat Medic: Cube's moveset is mostly centered on heals and support. He has an instant-speed area heal and a buff, and even his damaging moves are mostly weak in power but have added effects (like inducing sleep or knocking enemies back). For straight battle, he does have the decently powerful counter Anti Field and the strong, but slow Maser Cannon.
- I Know Mortal Kombat: The reason Cube is capable of "fighting" the final boss of his chapter is because he hacked the Master Computer through a videogame console.
- Ironic Nickname: Cube is, in fact, perfectly round. Kato named him such specifically because it was the opposite of his appearance.
- Non-Action Guy: Cube is unarmed most of the time, and has to dodge fights entirely. To make up for it, he's the best healer in the final scenario.
- Improbable Weapon User: ...And then it turns out that he can use all those silly weapons Taro used in Akira's scenario.
- Spot the Imposter: When Cube and a previous prototype of him are in the same room and they need to figure out which one is the robot being manipulated by the ship, Kato says that the real Cube would know the first name Kato was considering giving him. It was 'Rover' and this causes Darth to shoot the prototype.
- The Unintelligible: Only makes robotic sounds and can't speak. Kato apparently didn't outfit him with speech.
OerstedProtagonist of the Medieval chapter. A Knight in Shining Armor, he has won the hand of the kingdom's princess, only to see her spirited away by the Demon King. He sets out to rescue her...
- As Long as There Is One Man: who believes in him, he'll keep fighting. Unfortunately, destiny decided to make him their bitch, and he snaps because of it.
- Despair Event Horizon: His chapter is all about showing how easy this could happen.
- Final Speech: After being defeated he warns the heroes that as long as there is enough hatred, anyone can become the Demon King.
- Heroic Mime: Unlike the other protagonists, except Pogo and Cube (kinda), and both of those were justified examples. It's intentional. At the end of his chapter, he stops being one, as he renounces his humanity, and becomes Odio the Demon King. Thus, it was likely that the player was meant to visualize himself in his shoes, and thus go through Oersted's mental breakdown exactly as he did.
- Also makes sense from a thematic angle: He is a silent protagonist, but in the end of his chapter, he stops being the protagonist, so he is no longer bound by this trope.
- Humiliation Conga: He quickly goes through one: seeing his friends die one by one, the people turned against him, all orchestrated by one jealous friend, and then his lover turns out to be in love with that jealous friend... all these after being told that As Long as There Is One Man...
- Knight in Shining Armor: His general character design and personality. At first.
- Leitmotif: "Wings That Don't Reach". The name foreshadows his fall from grace. He, as Odio, is also associated with "Demon King Odio".
- Madden Into Misanthropy: After the public demonizes him, his former best friend reveals he set up the events leading to his ruin, and the girl he was trying to save rejects him and commits hara-kiri, he finally takes his misery out on humanity.
- Magikarp Power: To be quite frank, his starting stats are absolutely pathetic and he can barely defeat anything early on. However, his stat growth is fantastic and he gains an array of very powerful abilities, so by the time you no longer have a full party, you're at the point where you don't need them.
- Start of Darkness: When Alicia declares that she no longer believes in him and commits suicide right in front of him.
- Then Let Me Be Evil: At the end of his chapter, he concludes that, if that's the way the world wants to see him, so be it.
- Woobie, Destroyer of Worlds: Loses, is rejected by, or is horribly betrayed by everyone and finally becomes the Demon King Odio.
GoriPogo's sidekick, a gorilla. He has a bad habit of screwing around with Pogo, but he's loyal nonetheless (and usually gets as much crap as he gives).
- The Big Guy: While his moveset is more limited and he can't wear most equipments, he is physically stronger than Pogo. His basic attack deals almost twice the damage of Pogo's.
- Everything's Better with Monkeys: Pogo's gorilla pal.
- Dung Fu: He can throw his poo to deal Area of Effect damage.
- Fartillery: Like Pogo, he can weaponize his flatulence.
- Non-Human Sidekick: As a gorilla, he is this to Pogo.
BelA cavewoman meant to be a Human Sacrifice to O-D-O. She escapes and makes it to Pogo's tribe. Ultimately, the two fall in love and she bears his child.
- Magikarp Power: She is excessively weak and squishy so most enemies kill her in two hits at most, making her utterly useless in battle. However, she learns an area of effect heal which also randomly buffs early on, and if you bother leveling her up to 7, she learns LaaLaa, an obscenely powerful area-of-effect spell. She leaves the party shortly, but she does rejoin you in time for the O-D-O battle and LaaLaa turns the tyrannosaur into a complete joke.
- Musical Assassin: Her ultimate move, LaaLaa, manifests as music notes that attack the enemy.
- Squishy Wizard: She is a very useful healer with WaveWave and her ultimate LaaLaa hits like a nuclear warhead. However, she also folds like a wet paper towel if hit by an enemy.
- You Gotta Have Blue Hair: Her hair is purple for some reason.
ZakiThe Rival to Pogo, son of the Kuu tribe chieftain, sent out to retrieve Bel after her escape. Tends to flip his hair and wears a lizard on his crotch. Following his father's death, he aids Pogo and allies against O-D-O, becomes the Kuu tribe chief, and makes peace with Pogo's tribe.
- Evil Redheads: Although he undergoes a Heel–Face Turn eventually.
- Guest Star Party Member: Against the Final Boss of Pogo's chapter.
- Hair Flip: Despite being a caveman he is absolutely fabulous.
- Heel–Face Turn: Very last minute (getting eaten by a T. rex is low on his list of priorities, it seems), but it looks genuine in the aftermath. Perhaps he was Just Following Orders.
- Recurring Boss: Fought no less than thrice over the chapter.
O-RoboA karakuri activated by Oboromaru and possessing his look. Possesses different skills than Oboro; can't handle overly high falls, long exposure in water, or mice.
- Sdrawkcab Name / Punny Name: His name is the first five letters of Oboromaru's name, spelled backwards and hyphenated. Also, he's a robot.
Ryoma SakamotoThe legendary swordsman said to be able to stabilize the country. Ode Iou's men imprisoned him to perpetuate war, and Oboromaru is sent to rescue him.
Wild West Chapter
Mad DogA Bounty Hunter after the price on Sundown's head. He has no choice but to team up with Sundown to face the Crazy Bunch. Following that, it's up to the player whether he survives.
- Cool Horse: If you spared Mad Dog in the final battle, he'll tame the O. Dio horse that had ran off earlier... only to lose it again when Sundown shoots his reins like last time.
- Enemy Mine: He only came to Success Town to hunt Sundown, but decided to put it off long enough to fight off the Crazy Bunch.
- Leaning on the Fourth WallMad Dog: Reckon it might be a good idea to save now, don't you think?
- Older Hero vs. Younger Villain: His relationship to the Sundown Kid. He starts off with newer, better equipment than Sundown and is only a level lower than him.
- The Rival: To the Sundown Kid. Lampshades that they've been doing this far too many times than he could remember.
Present Day Chapter (Your opponents)
NamcatMuay Thai master who's obsessed with his beauty and claims that nobody could touch his face. Masaru proves him wrong.
- Dude Looks Like a Lady: It's very easy to think that Namcat is a she...
- The Fighting Narcissist: As stated above, he's very proud of his looks.
Great AsiaA Japanese Luchador with his own style called 'El Rudo', his brutality granted him the nickname 'Dark Angel'. Oh, and he likes biting heads off like Blanka.
Tula HanArmy guy and master of close quarter combat, which includes bone-breaking skills and overall CQC-like skills.
Moribe SeishiOld Japanese martial artist with a knack for barehanded killing. He damages the enemy from within with his fists and his attacks (especially Tsuda) can decrease stats.
Max MorganAmerican best wrestler turned Hollywood star who is bored with the competition and always looking for a good fight. Resemblance with Hulk Hogan is probably coincidental.
- Captain Ersatz: Of Hulk Hogan.
- Eagleland: Type 1 with shades of Type 2. While cocky and boisterous, he wasn't that demeaning to Masaru and compliments Masaru if he's beaten.
Jackie IaukeaSumo wrestler who went to Japan to prove his skills and failed... and instead now tries to challenge the international ring.
Near Future Chapter
Matsu KenichiA biker gang leader who defected from the Crusaders and became Akira's best friend and brother figure. When he was with the Crusaders, he killed Akira's father and has been making amends. He dies sacrificing his life to empower the Buriki Daioh.
TaroAkira's Robot Buddy created by Professor Toei. Made from a turtle.
ToeiEccentric professor and mechanic of the Buriki Daioh who helps Akira in eventually piloting the machine itself.
Buriki DaiohAn ancient, forgotten mech, built in Ancient Babylonia. Only those with psychic powers can activate it. Possibly the only chance anyone has to stop the God Odeo.
- Ratings Are Off The Scale: HP: ???/??? (Not infinite, however)
KatoCube's creator. A nerdy, sensible, kindhearted technician.
DarthA military corporal and passenger on the Corgito Ergosum; his job is to guard the Behemoth. At first a robot-hating douche, but after surviving the ordeal at the ship with the help of Cube, he warms up to him.
- Badass: He took down a Behemoth without killing it... and lives.
- Fantastic Racism: Hates Cube and mechanical things in general because during a mission, he had his whole squad killed by robots. He later softens up and befriends Cube.
HueyKato's friend, a seemingly sensible man who has a crush on Rachel.
RachelThe sole female of the crew, and in love with Kirk... to an unhealthy degree. Communications officer on the Cogito Ergosum.
KirkA gung-ho officer, Rachel's lover. Pilot of the Cogito Ergosum.
Captain HolCaptain of the Cogito Ergosum, who strangely has no direct contact with his crew.
Captain SquareFictional character of the Captain Square minigame.
- Cool Shades: Wears a pair of green sunglasses.
- The Good Captain: He bears the title of Captain, and he's the hero of his game.
- Lantern Jaw of Justice: Most noticeable in his win pose.
- Scarf of Asskicking: Which strangely seems to always billow out behind him no matter what he's doing.
StraybowOersted's friend, a wizard who was second place in the tournament for Alicia's hand. During the fight with the Demon King, he sacrifices himself to save his allies.
- Always Second Best: And he hates it.
- The Atoner: Maybe. He's probably aware that he started the whole mess regarding Odio at least and is genuinely shocked about it.
- Evil Sorcerer: Not at first, but his envy of Oersted pushed him over the edge.
- Final Boss: Of the Medieval Chapter.
- Gone Horribly Right: He set out to break Oersted's spirit. He succeeded, and the entire kingdom of Lucretia, and a whole lot of other people in other times and lands, suffer for it.
- Master of Illusion: His plan kicks into high gear when he makes Oersted see the King as the Demon King one night... It's unclear whether he was the one who created the other false Demon King or not.
- Sidekick: To Oersted ...and he's sick of it.
- Unwitting Instigator of Doom: Now, if he was just able to keep his jealousy and issues being the Number Two at bay, the whole existence and all timelines might not have to be terrorized by Odio.
UranusAn old priest who previously saved the world from the Demon King along with Hash, and was seemingly able to resume normal life until the Demon King returned and he, with Oersted and Straybow, must urge Hash to get back in shape and face the Demon King again.
HashThe man who killed the Demon King previously and hailed as a hero, but quickly was disgusted with how humanity just tossed him once he's out of uses, and retired as a hermit. Uranus calls him out for this when the Demon King returned and Hash joins Oersted to prove that he's still in shape. He succumbs to a long-term illness after the battle, and trusts Oersted to carry on his legacy as a hero.
AliciaThe princess of Lucretia Kingdom and betrothed of Oersted. When the Demon King captures her, she patiently awaits Oersted's help.
Running Gag character
Watanabe & His DadAll throughout history, recurring again and again, a father and son (the son's name being some variant on Watanabe) appear. The father is killed in some way or another, leaving Watanabe to burst into tears and run off.
- Prehistoric Chapter: They're not named, but one of them cries when the other falls down a pit trap. (Incidentally, this pit trap is nonlethal if Pogo falls in it.)
- Kung Fu Chapter: Wan-Tan tries to avenge his father's death at the hands of the Yi Po Men Kung Fu school by unleashing his secret technique... and fails. Only available if the Xin Shan Quan successor is Sammo.
- Bakumatsu Chapter: Watanabe and his father are ninjas trying to steal Ode Iou's treasure. Either they succeed (because Oboro killed the man in the room below) or, after dodging multiple stabs, the father is impaled.
- Wild West Chapter: Watt and his father arrive at Succez just as the Crazy Bunch show up. Dad takes a bullet.
- Present Chapter: Watanabe's father throws a cola bottle at Great Asia. Great Asia turns around, jumps out of the ring, mauls the man to death, and returns to the ring. You need to herd Great Asia into the lower-right-hand corner to see this, and it's still not guaranteed.
- Near Future Chapter: Watanabe is actually one of the orphan kids staying in the same orphanage as Akira. His father reportedly ended up captured and turned into liquified human to revive Odeo. He's actually used to power the boss robot fought in the facility.
- Sci-Fi Chapter: A pair of main and sub antennas, controlled by Watanabe communication system. Used in a creepy way, and not played for laughs. If you're familiar with the Watanabe gag, the moment "W-A-T-A-N-A-B-E" shows up in the text bubble, you know one of the two astronauts currently in space is not long for this world. It starts the horror for real.
- Medieval Chapter: Straybow kills a man named Watt Nabe during the tournament at the start, whereupon his son carries him away.
- Final Chapter: Watanabe and his father are statues in one of the dungeons. Akira can read their minds, revealing that Death Prophet petrified them for running away too many times.
The Walking Spoilers
Due to the nature of the following character(s), spoilers are unmarked to avoid redundancy.
Demon King OdioThe Demon King and main villain of Live A Live. His various incarnations cause trouble to different protagonists from several points in time, and he's what binds all these stories together. See Oersted for more information.
- And Now for Someone Completely Different: If you choose Oersted's version of the Final Chapter, you get to play as every single one of Odio's incarnations in a Reverse Boss Rush.
- Apocalypse How: In his scenario, when he is about to lose, he can pick the Armageddon option and causes a Class Z. He also casts Armageddon if you lose against him when he's in Pure Odio form.
- As Long as There Is Evil: As long as there is hatred, anyway. Anyone can become a demon like him because of it. Though the way he says it comes off more like a warning that someone someday will pick up where he left off, rather than a typical "I'll come back to haunt you!" taunt.
- Big Bad: Of the game as a whole, and his incarnations serve as the Big Bads of their respective chapters.
- Final Boss: Many of his incarnations serve this role for each chapter. Odio himself plays with this trope a bit.
- Graceful Loser: After being beaten, he took his defeat well and asks the heroes to just kill him already. This leads to a bad end. Later, when he resurfaced and tried to prove his point by sending a Boss Rush and was thwarted again, he also was quick to realize that the heroes were right when they point out their differences: His heart was too weak, so he fell into despair's influence. In his dying breath, he gave a fair, but stern warning about As Long as There Is Evil, rather than cursing them.
- I Have Many Names: Take your pick: O-D-O, Odi Wang Lee, Ode Iou, O. Dio, Odie Oldbright, Odeo, OD-10, Oersted...
- Leitmotif: "Demon King Odio" serves as one for him and his incarnations. Technically, "Wings That Don't Reach" is one as well.
- Meaningful Name: Odio means hatred. His various incarnations go on and on about hate. Medieval Chapter shows why Odio is so fixated on hate.
- Misanthrope Supreme: After all that happens to him, he abhors humanity and considers them worse than animals, since the latter only kill to nourish themselves.
- One-Winged Angel: Pure Odio. In fact, his true form shows up before defeating his first form as the Odio Mole, but attacking him in this state will just cause him to heal and buff up his other components.
- Clipped Wing Angel: After defeating Pure Odio, you have the option of finishing Oersted off in his human form (though be warned, this leads to the neutral ending). Oersted still has player-character stats and doesn't benefit from Health/Damage Asymmetry, so he tends to go down very quickly. The Boss Rush in the good ending also counts, since all of Odio's incarnations have the exact same stats as when you first fought them, while (if you were smart) the heroes should have levelled up enough to solo them easily.
- Sad Battle Music: "Cry-A-Live" plays when Pure Odio is defeated and becomes Oersted again, and continues into Oersted's final battle if you decide to finish him off.
- Shadow Archetype: Many, many of Oersted's factors were represented by the heroes and were scarily same, only that Oersted's versions just Gone Horribly Wrong. To wit...
- Pogo was able to gain love and work it out well, while Oersted was screwed over by love, but if the bad end was achieved, he would still utter Alicia's name, signifying that deep down, he might've still loved her.
- Li described herself as envying a lot of people in the past, including her Master's strength, but was able to attain strength by believing in people and never giving up. Oersted was struck with Straybow's enviousness hard and gave up being human.
- Oboromaru used to think that it's fine to kill people for the order, but realized the wrongness of killing people for the wrong reason, and the world can change because of trust thanks to Ryoma. While Oersted used to believe As Long as There Is One Man that trusted him, he could fight on, or so Uranus/Hash said, but when nobody believed in him, he snapped and killed everyone for very wrong reasons.
- Sundown Kid used to be a loner after an unfortunate accident that killed a lot of people. But by helping people again, he started to long for companionship and loses his Death Seeker status. Oersted wasn't a loner at first, but in trying to help people and horribly failing, he ended up becoming one and hating everyone.
- Both Masaru and Oersted sought strength, but Masaru also puts importance in the strength of heart, thus his heart remained strong and enabled him to gain strength over those who he has defeated. Oersted was weak-hearted enough that despite his strength, he eventually let himself snap and became the next Demon King.
- Akira was always a believer that he makes his own destiny and he'd Screw Destiny or any other craps that tried to direct his life. Oersted, unfortunately, always had his life directed by others: if other people say he's a hero, then a hero he would be. If other people say he's a demon, a demon he would be, forgetting that he used to be human. It was something that Akira calls him out on and refers to him as a Hypocrite as a result.
- Cube, despite being a robot, was not at all a crapshoot, and tried hard to keep his fellow human companions safe. He was the one that managed to fight off the super computer going haywire, despite the computer's reasoning that Humans Are Bastards. He took Huey and Corporal Darth's words to heart, striving to learn and learning never to hurt another human. Oersted also saw humans being ungrateful and bitter, but ultimately gave up on them when he was personally injured by their words.
- Theme Naming: Every single main villain originated from Odio, so every one contains his name in some way.
- Villain Protagonist: Playable in the Final Chapter.
O-D-OOdio's incarnation for the Prehistoric Chapter. The cavemen of Zaki's tribe worship him, and Bel is intended as a sacrifice to him. It is a Tyrannosaurus rex and probably the last dinosaur on earth.
Odi Wang LeeOdio's incarnation for the Kung-Fu Chapter. Leader of the Yi Po Men Kung Fu who terrorized the land with his iron fist. He saw opposition in the Xin Shan Quan school and tried eliminating it, killing two possible successors, but the master, along with the surviving pupil, put a stop to his ambition and life.
Ode IouOdio's incarnation for the Bakumatsu Chapter. A warlord trying to engulf Japan in war by imprisoning Ryoma Sakamoto and using evil spirits. Can turn into a Frogsnake Demon.
- One-Winged Angel: His Frogsnake Demon form.
O. DioOdio's incarnation for the Wild West Chapter. Leader of the Crazy Bunch terrorizing the land. Actually a horse possessed by the ghosts of Custer's Seventh Calvary. Provided that Mad Dog survives, he ends up being Mad Dog's new horse. For a while.
- Gatling Good: His weapon of choice.
Odie OldbrightOdio's incarnation for the Present Chapter. A bald, tattooed fighter, who belives that being the strongest means killing all who oppose you. He slaughters all of Masaru's previous opponents, and when Masaru learns this, he flies into an Unstoppable Rage and strikes Odie down.
- Arrogant Kung-Fu Guy: Worse than Odi Wang Lee. He killed of all of Masaru's opponents, and gloated about it.
- To the Pain: Though not to the direct victim, but he goes into a quite detailed explanation of how he killed his opponents in front of Masaru.
Odeo & his followers.Odio's incarnation for the Far Future Chapter. A God asleep until fueled with human hatred. The Japanese Government teams up with a fringe-Buddhist temple to do so, using liquified humans and their rage at their state to power it. Buriki Daioh shatters the statue Odeo uses to incarnate, and the liquified humans consume his followers.
- God Is Evil: Or at least this incarnation becomes an evil "god".
- Hoist by His Own Petard: Odeo's followers get assimilated with the human liquid they created to awaken Odeo.