Sym-Bionic Titan provides examples of the following tropes:
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Ace Custom: Ilana's mech, Corus, is implied to be this since no others like it were ever shown. Lance uses a standard issue Manus armor with a slightly different color scheme; the Combining Mecha aspect probably isn't standard, though, since the King passed him a new model (his old one had been confiscated) before sending him off.
Acting for Two: John DiMaggio as General Julius Steel and Ilana's father, the King of Galaluna. He keeps popping up as extras all over the place, along with Tara Strong. Of course, with their wide ranges and main character positions, this isn't really too surprising.
Acting Unnatural: In "Lessons in Love", Newton and Kimmy are about to kiss when Lance and Ilana burst in. Newton randomly shouts out the word "Parallelogram!" and extends his book pages forward towards Lance and Ilana, while Kimmy opens her book upside down.
Action Bomb: Tashy 497, of the explodes when killed (or just when it dies) variety.
Rather subtle by Western Animation standards, yet rather blunt by this show's standards. Episode 4 had a healthy-eating Aesop, but it focused less on "eating healthy" and more on "eating things that are edible". It also had a good minute's worth of Lance with an armful of fruit eating a nutritious breakfast for no other reason than to... show him eating a nutritious breakfast. Actually, the healthy eating message was more of a metaphor for the actual plot of the episode involving Lance's boredom with Earth life. The blandness of the food is Lance's boredom with Earth, but he later realizes that even though it's bland at first, it has qualities that are good for him in the long run. Kids will understand the health message, but older audiences will see the subtext.
Episode 10, which is most remembered for the "Booty Quake" scene, actually did deliver a rather subtle aesop where Octus all but told Kimmy she didn't need to act like a ditzy airhead just because society expects her to act that role.
All There in the Script: Several characters that are not called by name in the show have their names listed in the credits. This applies to most of the human cast and even some of the aliens. For instance, the Goth girl who likes Lance in "The Ballad of Scary Mary" is named Kristin, and the Mutraddi frog creature in "The Demon Within" is named Muculox.
And if Octus' scans are right, they breathe similar gases, too. If we think that the king explicity sent his daughter to that particular planet, we can consider that just because our planet is like Galaluna, he sent her to Earth.
All of the Mutraddi (the intelligent ones anyway) speak English as well.
All Girls Want Bad Boys: One of the reasons all the girls at Sherman High are into Lance. Octus even lampshades it at one point when Lance is being swarmed by fangirls.
Ilana: I don't get it. Octus: Dark hair, bedroom eyes, moody demeanor. I totally get it.
Animation Bump: The show has always looked good, but some episodes are simply gorgeous with feature film-quality animation; a good example is "Escape From Galaluna." The entire episode is simply beautiful.
Appropriated Appellation: The "Titan" part of the robot's name is added after it's referred to as one by the Earth media.
Back-to-Back Badasses: Lance and Solomon in Episode 11. Not only is it awesome, it's a plot point, since Solomon should not know the martial art Lance uses. Ilana and Lance do this later in the same episode just before they get their watches back.
Barrier Warrior: Ilana's Corus armor allows her to create force fields and the theme is carried over to her controlling the Titan's shield arm.
Batman Gambit: Solomon pulls one to figure out how the Titan works.
Beauty Equals Goodness: When General Steel goes even crazier than before in episode 20, his features are noticeably more detailed and ugly; jagged teeth, wrinkles, liver spots on his hands...
Berserk Button: Don't try to hurt Lance or Ilana in front of Octus. In the episode "The Fortress of Deception", he reaches downright Terminator levels of single-mindedness when Lance and Ilana are kidnapped. Also, don't imply that he is Just a Machine.
Beware The Cute Ones: Tashy 497. You will coo and squeal at him forever... at least until you remember he can take out an entire planet.
BFG: In flashbacks to the Mutradi invasion, the king is shown fighting along his troops with a standard issue rifle. The thing breaks in his hands, so a mook immediately passes him a bigger gun. Much dakka ensues.
BFS: Sym-Bionic Titan's sword, created out of the pilots' thoughts.
Biting-the-Hand Humor: The first episode has a parody of the type of teen dramas usually found on half-sister network The CW. "Tonight on the WC!"
Blatant Lies: Octus has to "go to the bathroom" a lot. With his brother and sister. Kimmy eventually gives up trying to get him to explain what he's really doing, but she's still not too happy about it.
Averted so far (probably due to their status as "siblings"), but we do get occasional Ship Teases and He Is Not My Boyfriend moments. Genndy has actually stated in an official interview that he intends to go for a non-romantic relationship with Lance and Ilana because he finds doing a friendship between male and female characters is more interesting and that having them fall in love would be too easy. As of "The Ballad of Scary Mary", alternate potential romantic interests have been introduced for Ilana and Lance. In said interview, Genndy stated that the relationship of Pazu and Sheeta of Hayao Miyazaki's Castle in the Sky served as inspiration for that of Lance and Ilana. To him this was a bond of mutual friendship with no romantic attractions involved.
Ilana's former bodyguard Hobbs in "Escape from Galaluna" might qualify, as they both showed a mutual affection for each other.
Calling Your Attacks: Though it's not necessary, Lance has on occasion called out a given weapon which the Titan created.
Came Back Strong: Octus and the Titan in episode 20. The new Titan is far more powerful and curbstomps three rather strong monsters that had G3 and General Steel completely outmatched. Lance even says Titan feels stronger than before.
Camp Gay: Todd, the male member of the dance committee duo, is a rather family friendly version of this.
Car Fu: The way Lance drives his car. On scaffoldings, and getting big air on broken pavement. It's almost Le Parkour with a car.
In a flashback to his academy days, Lance was grabbed from bed and dumped in the hall in his underwear. The headmaster treats it as if Lance did this deliberately, despite the student body being well-aware of Baron's Jerk Ass behavior.
Lance again in episode 16, when the king refuses to believe that there's an invasion on the way, and Lance is dismissed as a lunatic. Said invasion shows up not long after.
The Cheerleader: More mean than stupid, but they don't exactly scream honor-roll material.
Child Soldiers: The Academy is a military training facility which starts training future soldiers as children. To be fair, however, it is partially Truth in Television: most of them are teenagers, and military schools do exist for such ages. However, they also showed a row of children who looked even shorter, and, presumably, younger than Lance and Arthur — who were already small and really young-looking to begin with. It's worth noting that the whole episode was a pretty big tribute to Ender's Game, which is about a kid being trained to become a soldier.
Combat Pragmatist: Lance displays this during the flash back episode. Outmatched by the traitorous instructor, he used a rock to block his sword, and runs him through with his.
Combining Mecha: Sym-Bionic Titan, formed when Corus, Manus, and Octus combine. Manus telescopes and forms the skeleton of the robot, Corus is situated at the literal heart of the robot, and Octus expands and then wraps tight around the frame defined by Manus, acting like the robot's "skin".
The construction site in Episode 5 is the same place that was destroyed by the first Monster of the Week.
And even before that, the giant effing crater in the middle of the city in Episode 2.
G3 has a storeroom of alien objects, including the trio's spaceship and the remains of several monsters they killed in the previous episodes.
In Episode 12, Kimmy is seen talking to her friend about the latest episode of Highschool Heights, a Show Within a Show mentioned in the first episode. "He can't read?" The show is mentioned again in Episode 13, too. Apparently Ilana and Octus are both fans.
In "Disenfranchised" we see that the legs of the giant Mecha-Hydra from way back in Episode 2 are in the exact same spot, and a park has even been built around them. The episode also has General Steel's spy questioning students about the events of "Showdown at Sherman High".
In "Under the Three Moons," the mall is still being repaired from the destruction caused in Episode 2.
In "The Steel Foe" Lance says that the H.M.E.R. is made of Mutraddi metal from the missile that was carrying Tashy.
Conveniently Empty Building: Subverted. The pilot episode has the Titan destroy an entire section of the city against the first Monster of the Week. The following episode strongly implies that the cost of the damage was more than just financial...note However, a huge death toll would probably scare people away from a city where alien giants keep showing up on a regular basis, instead of their going on with their lives as if nothing happened. Except, the populace is showing signs of apprehension and trauma, and the military is suddenly everywhere...
In the finale, we actually SEE people inside of the buildings that are being blown up
Cool Car: Lance's new hobby in "Roar of the White Dragon".
Crystal Spires and Togas: Galaluna appears to be this initially, but as the series progresses and we get more flashbacks, it has more of a British Regency flavor — in terms of dress, at least; the architecture is pretty lofty. And the military uniforms have Napoleonic sensibilities.
Pretty much any fight Lance has with jocks or criminals.
And a literal example when it comes to the Titan's battle with Xeexi.
The H.M.E.R's first fight. Given the Tokusatsu influences, this isn't a suprise.
H.M.E.R, G3, and Lance and Ilana all three suffer this at the hands of the three newested monsters Modula sent. H.M.E.R gets torn to pieces as well. The situation is completely reversed when the Titan Came Back Strong, making it strong enough to completely dominate all three monsters with no effort. In fact, it would appear they were playing with the first one to test out their new powers.
Cut Short: And how. Given all the storylines which went unresolved (including a handful which came up in the finale alone) the series pretty much has an open ending with no closure short of a feature film being created several years after the series ended. Fortunately, the recently revived Toonami segment of Adult Swim has picked the episodes back up, and a petition with a lot of supporters to begin making new episodes.
Dance of Romance: Between Kimmy and her ex-boyfriend, and Jason and Maribel, and Lance and Ilana (though it can be debatable that it was arguably more of a sibling/familial-like dance than a romantic one) in "Under the Three Moons."
Episode 18 is where the show has a main character death, that of Octus.
Deadly Prank: In "The Ballad of Scary Mary", Mary is never seen again after a group of classmates lure her into the woods to tar and feather her. The trope is subverted at the end of the episode, when it's revealed that Mary wasn't killed, but instead hit it off with a cute biker boy she met in the woods and ran off with him.
Death World: If the local fauna is any indication, Mutrad is probably a huge one.
Determinator: When the H.M.E.R. is smashed by an alien, general Steel doesn't give up. He gets out of the top and shoots the alien monster. With a regular handgun.
Deus ex Machina: The mystery leader of G3 not only brought Octus back to life but made him stronger, just in time for the finale. At best, a type 2. More likely a type 3. This would have been explained in Season 2, had the show not been Screwed by the Network. It was originally intended as Foreshadowing, but since we'll likely not see to what it was foreshadowing, it comes off as a Deus ex Machina.
Diabolus Ex Nihilo: The energy creature from episode 18 shows up with no explanation for its presence or what it even is.
Didn't Think This Through: In order to contain a mutated and violent Ilana, Octus traps her inside his shapeshifting armor. However, he failed to consider that it would allow her to attack his "head", and pretty much names the trope.
Disney Acid Sequence: When Lance begins studying for his driver's license, it devolves into one of these
Downer Ending: Episode 18. Though it's arguably just a Downer Episode altogether. Things certainly don't look too bright for Lance and Ilana now that Octus is dead. Especially since they can't form Titan anymore.
They don't seem to have much of a problem with violently dispatching the monsters, either. In Episode 5 it shows Titan ripping off its limbs and punching a hole through it.
And in Episode 15 they literally hack the monster to pieces with a scythe.
Episode 16 has Lance stabbing a traitor who we then see fall from an extremely tall bridge. Though it's partially cleaned up by the fact that the wound isn't shown and he falls in water, it's pretty clear what happened.
Episode 17 has two. First the newly introduced Monster of the Week tears another monster to shreds and kills it by tearing its throat out. The monster itself is killed by being literally beaten to death by the Titan, blood splattering all over it as it does so
Octus' death in Episode 18 is pretty brutal, what with being electrocuted and drained of all his energy all while writhing in agony.
The three monsters in Episode 20 are brutally dispatched by the new improved Titan. The first one gets its leg severed and a spear driven down its throat. The second one gets an arm chopped off and sliced in half, and the final one is ambushed from behind and cut in half, its blood splattering all over Steel.
Fangirl: Lance has quite a few of them at Sherman High, and Ilana had at least three on Galaluna who loved her so much that they copied her hairstyle.
Kimmy's "little dance" for Octus qualifies as this.
They seem to have a penchant for exposing Ilana's legs as well. There's actually a scene in episode three featuring both shirtless Lance and Ilana in short shorts. And then there's the episode full of chearleaders crawling around an air duct.
Speaking of Ilana, at the end of "I Am Octus" her overalls have less material than Lance's shirt.
Foreshadowing: In Episode 13, Octus says something to the effect of "Nothing stays dead today." At the end of the episode, Ilana's heart stops. In an almost literal moment of Heart Is an Awesome Power, it starts again.
General Ripper: General Steel has a "shoot first, ask questions never" policy with aliens. That this might not be the best policy to deal with alien threats can be seen in Episode 3.
This may not be the right trope to file this under, but the fact that Solomon was willing to sacrifice probably millions of dollars in damage to their Helicarrier, the lives of his men, and even beat the living piss out of them himself is pretty goddamn committed. This is probably one of the most unrealistic parts of the show.
Even as General Ripper types go, Steel would've already been removed for being dangerously psychotic.
General Failure: General Steel. He loses mostly every fight he's in, causes most of the property damage, and always goes "Never My Fault" whenever things screw up.
Genius Bruiser: Octus may be The Smart Guy of the trio, but his robot body allows him to kick just as much ass as Ilana and Lance if push comes to shove.
Lance is fully aware that if they attempt to fight the first creature that Modula sent to Earth, it would give away their position, causing him to send more creatures after the fact, and refuses to fight it. Ilana talks him and Octus into it later, however.
Xeexi may count as well, being much more subtle and intelligent than most bad guys. Unfortunately for him, he did not kill Lance....
Geeky Turn-On: Octus's reaction to the White Dragon's car is to remark how it makes his "circuits tingle". Lance responds, "Mine, too."
Gilligan Cut: In the first episode, when the gang try and introduce themselves without disguises.
Ilana:(hiding in a cave) If we're going to blend in with these Earthlings we'll need to know more about them. Perhaps we should go down there? Octus: Agreed. (cut to the two aliens and one semi-transparent robot appearing before a lone woman in a darkened parking lot) Ilana: Salutations. (beat) Woman: ...AAAAAAAAAAAHH! Lance:(back in the cave) Well... that didn't work out so well.
Goth: Kristin, who hung out with Lance in "The Ballad of Scary Mary".
Gross-Up Close-Up: As mentioned above, the Cafeteria person, and done again in Episode 4 with the teacher. And in Episode 10 with the pimple-faced nerd.
Had the Silly Thing in Reverse: In the flashback episode, Ilana and her bodyguard are able to tank-jack, but since the bodyguard was too wounded, Ilana had to drive the tank. The first thing she does at the controls is drive the tank in reverse.
Hartman Hips: Being a suburban middle-aged woman, Barb has these in spades. Is it really that much of a surprise? Genndy has clearly utilized this trope before on a certain kid genius's mom. Ironic since Hartman worked on that show alongside Genndy.
The Heart: Ilana. She's even the Heart of the Titan.
Octus pulls a She Is Not My Girlfriend to Lance and Ilana when they start teasing him about Kimmy. In the same episode, Lance and Ilana are hanging out when a classmate of Lance's bumps into them and assumes Ilana is Lance's "lady." They both deny it, Lance saying Ilana is just a friend while Ilana simultaneously blurts out that Lance is her brother.
Hero Killer: The Energy Cloud monster from episode 18. It's impervious to nearly everything they throw at it and is able to permently drain the energy out of electrical devices, meaning its dangerous to try and use their Powered Armor or Octus against it for risk of losing them for good. It becomes a literalHero Killer by killing Octus at the end of the episode. It takes the G3's battleship firing everything its got at it and blowing up the space station it was in to kill the darn thing!
Hero Insurance: Specifically averted. The first use of the Titan is specifically mentioned as having caused $14 billion in damage, and the battle scars on the city are shown and played for drama. Also shown when in their second battle, they actively try to avoid causing damage to the area they're fighting in. Later episodes show them actively trying to move the fight away from inhabited areas before it starts.
Heroic Sacrifice: Octus is killed by the energy cloud while trying to save Lance.
He's Just Hiding: Out of universe, many people believe this of Lance's father. In universe, Lance agreed... at first.
Ilana: Why do you think my father chose somebody so...strange? Octus: Maybe your father sees something in him that none of us do.
General Modula seems to have more than just a working relationship with the king prior to whatever mishap led to him being left behind.
After her many attempts to get out of working on math problems, Kimmy admits that she is well-aware of her status as Alpha Bitch and The Ditz and is convinced that's why she's "stupid," and even breaks down crying in front of Octus.
High School Dance: The plot of "Under the Three Moons" revolves around the Sherman High's Homecoming Dance.
Hippie Chick: Ilana gives off this vibe, with all her talk of the heart, body, and mind as one. Partially subverted: She does have a problem with school lunches having only 1% meat content, while the stereotypical hippie is, of course, a vegetarian. She is trying to provide healthier food for the school though, but anything would be healthier than what they had. She's also been seen to sport some pretty funky clothes, like the technicolor nightmare in Episode 5.
Hipster: The band Lance joins, Disenfranchised, in the episode of the same name, comes off as this. They kick Lance out of the band at the end of the episode because he's attracting too many mainstream fans.
No one, not even Octus, had any idea they had the Titan at first. They figure out how it works pretty fast, though.
Shown in "Disenfranchised," Lance made a Kusarigama weapon construct for Titan, and when he did, Octus was shocked because he didn't know they could do so. It seems to imply that there is really no limit to the constructs Titan could create.
Idiot Ball: The King. Should've listened to Lance, huh? Justified, in that Lance's sullen behaviour and tendency to get into trouble at the Academy meant he was a constant disappointment to the King. By the time of the invasion, Lance had very little credibility with the King.
Ignore the Fanservice: Octus doesn't respond to Kimmy's attempts to seduce her way out of studying the way she'd hoped.
The Titan robot is about at least several stories tall and must weigh quite a few tons, yet it can perform impressive feats of martial arts with no regard for the laws of physics.
Subverted with the H.M.E.R. It's bulky, slow and needs a ridiculous amount of jets all over in to make simple maneuvers.
I Need to Go Iron My Dog: By the time "Under the Three Moons", Kimmy is sick of Newton's constant "bathroom" excuses, which are especially unconvincing because Lance and Ilana always go with him, sometimes for hours.
Innocent Cohabitation: Subverted. The main reason Ilana, Lance and Octus all live in the same house together is due to their mission to blend in with Earthlings. They avoid arousing suspiscion by pretending to be a family. And so far, there has been no romantic interest amongst them to complicate things.
Ironic Juxtaposition: Kimmy turns on her iPod and happydances her way home to A Flock Of Seagulls, while the Titan fights the EMP monster in the background behind her. There are visual similarities between her motions, swinging off the streetlamps, and the Titan swinging the monster by its tail.
Irony: The final episode is called "A New Beginning"
The White Dragon, who harasses Lance over a tiny slight, hounds him even when the Monster of the Week is trying to kill them, and uses his gang to cheat in a street race by trying to get Lance to crash.
Baron, Lance's rival in the Academy, who was also bad enough to try and kill him. Lance must be a psycho magnet. Baron even "killed" his own team during the war games just for a better shot at the top spot.
Jerk Jock: Ridiculously exaggerated versions appear in the first episode. Played straight with Baron, Lance's academy rival.
Left for Dead: Modula's main issue with the king is this, which lead to his Face-Heel Turn. The king genuinely thought he was dead, not that Modula cares.
Left Hanging: Due to the shows cancellation, we will never find out what G3's connections to Galaluna were, or who the mysterious figure was who brought Octus back to life Not to mention Modula still ruling Galaluna and The King's unknown fate.
Letterbox: The whole series is presented in this format.
Ilana every couple of episodes, and the cheerleaders in episode 7.
Averted by the Alpha Bitch of said cheerleaders. Her skirt floats when they dive into a pool, so the viewers get an underwater Panty Shot. The rest of the cheerleaders play it straight, though, despite being in the same situation.
Octus, using a holographic system, though he always seems to retain his overall cylindrical shape and hasn't changed into anything other than his two basic forms. His size is especially strange since we've seen him visibly change his actual form (into a ball). Episode 11 shows he could put more effort into it if he wanted.
The Chameleon in episode 12 could shape-shift into absolutely anyone, at any size, even scaling up its impersonations.
The Masquerade Will Kill Your Dating Life: Happens with Newton and Kimmy in "Under the Three Moons." She breaks up with him because he's keeping secrets from her. It didn't help that he ditched her to fight a monster on Homecoming night, which she had put a lot of effort into so everything would be perfect.
The ending of episode 4, which suddenly segues from Lance happily serving food at the cafeteria, to Modula torturing the king for information on Titan.
Earlier in the same episode, Lance is beating the piss out of some crooks, and next we have a shot of him showering with a huge grin on his face, and the whole breakfast scene with him being unnaturally cheerful.
My Death Is Only The Beginning: Before getting crushed by the Titan, Xeexi manages to record their battle and send said recording to his master, making Modula aware of the Titan's existence.
Mysterious Past: Ilana apparently knows little to nothing about Lance's past, which Lance isn't fond of bringing up. Though at this point his past is substantially less mysterious to we, the viewers. Although in the pilot she explicitly says to him, "I know about you AND your past", what Ilana thinks she knows is pretty much what her father knows — a rather incomplete and slanted version of Lance's growing up years.
Name of Cain: In a recent episode, Ilana's cellmate introduces himself as Cain. Guess what happens.
Lance's father, though they still gave him a proper funeral.
Scary Mary, although she was only PRESUMED dead
Never Say "Die": Strongly averted, at least most of the time; not only do characters mention death but the monsters create massive amounts of collateral damage and most likely causalities as well. Modula also has no problem offing mooks casually.
In the second episode, he exposes their identities to Solomon in trying to deal with Monster of the Week. Not to mention attracting the attention of said monster in the first place by activating his mecha unnecessarily, due to his being overprotective of Ilana.
In the fourth, his vigilante activities not only get him caught by the Monster of the Week, but expose their secret weapon to Modula (who had thus far been baffled by the princess defeating his monsters).
No Ending: The series never resolves the war on Galaluna or the confrontation with Modula.
Nobody Poops: Averted in episode 2 by the realtor, then immediately exaggerated by Octus, who asks what the realtor was doing in there (justified, since Octus is a robot). Subsequently played straight so far for the rest of the series.
No-Holds-Barred Beatdown: When Octus and Ilana are feeling bad about missing the dance in "Uhder Three Moons", they end up beating the Monster Of The Week to death with Titan's bare fists.
Nosy Neighbor: Barb.Dear Lord, when she thinks the Lunis' have a new pet, she practically jumps on Mr. Lunis to find out what kind it is. Granted, this is Barb we're talking about. That was likely less her being nosy, and more like an excuse to practically jump on Mr. Lunis. And she has in every appearance so far walked straight into their house with no invitation.
Not a Date: Lance and Ilana's date-like hangout in episode 10. They don't think it's a date, but the person who invited Lance to the concert sure thought it was. To be fair, it wasn't played out like a date at all. There was no awkward sexual tension or anything between them, and it really just seemed more like they were casually hanging out.
Lance is completely apathetic to the constant stream of poon that passes his way.
Ilana counts, too, since she's seen Lance shirtless several times and is apparently not impressed.
Kimmy convinces Octus to tutor her in math, then she tries (sexily) persuading him to do her homework for her. He's quite adamant that she learn the subject matter herself. This could be chalked up to Octus being a robot, except by the end of the tutoring session, they've both developed feelings for one another based on emotional rather than physical attraction.
Not Wearing Tights: Ilana, Lance and Octus are essentially superheroes on Earth. They've got secret identities and special powers, and they fight monsters and save lives on a regular basis. The Titan robot itself seems to be considered a superhero by the general public, and Lance becomes the mysterious crime-fighting type as the Phantom Ninja. If they weren't wearing armor, they'd be wearing capes and masks for sure.
Out of Focus: Despite her importance to the plot and all, Ilana's backstory and character development don't get as much attention as her male team mates, and we have yet to see her win a fight without their help. The first half of the season tended to focus more on Lance while the second favored Octus. Perhaps if a second season had happened, Ilana would have gotten more time to shine?
Parental Abandonment: Lance's father is supposedly dead and we never hear anything about his mother. Ilana's father is being held by Modula and we haven't heard about her mother, either, though she may have been at Lance's father's funeral.
The reason for Lance's and Ilana's "sibling" spat in episode 3.
Episode 11 might have gone a lot better if a) G3 hadn't been so aggressive towards the team and b) if the team had answered their questions.
In the whole episode flashback to when Lance is at the Academy, he's bullied by Baron relentlessly until he shows his skills off in a suicide scenario. Baron decides to murder him with his two cronies following, and Lance is forced to get into a mech just to defend himself. Yet... he gets all the blame in the end since he didn't just speak out, try to get out stealthfully, and when the King confronts him... he didn't even inform him of what happened.
Lance (Id/Body), Ilana (Superego/Heart), and Octus (Ego/Mind).
Further, when they get into the local high school, they all end up as a different stereotype — Lance is a bad boy, Ilana is a flower girl, and Octus is a nerd.
Protagonist-Centered Morality: Because they're hiding out on Earth, the town they live in gets regularly attacked by giant monsters who destroy portions of the city (possibly killing hundreds if not thousands in the crossfire), but when Lance takes up vigilantism (which might make their visit a net positive for the city), he gets told to stop. Of course, Lance's actions resulted in a huge Nice Job Breaking It, Hero because he bit off more than he could chew, so Octus was arguably in the right to dissuade him.
Ridiculously Human Robot: The main theme of "I Am Octus". Throughout the episode we see Octus wondering how much is he a machine and how much humanity does he have, if the emotions he has are real or are they just some sort of automatized response.
The Rival: Baron didn't like Lance from the first moment he came to the academy. In his introductory episode alone, he tried to kill Lance after being bested only once. It remains to be seen if Baron will return later on in the series, but the odds are high in favor of it.
Roadside Wave: Happens to Lance and Ilana when they are hitchhiking in the rain in "The Steel Foe".
Ilana is willing to fight to protect humanity from the monsters out to get her, despite her bodyguards' advice to do otherwise.
It apparently runs in the family. During "Escape from Galaluna", her father, the king picks up a BFG and fights on the front lines with regular soldiers. It's implied he's an even bigger Badass than Lance. When Lance defeats the fake king in Ilana's nightmare, he convinces Ilana it's a fake by saying there's no way he could have defeated him so easily in real life.
Rushed Inverted Reading: Kimmy does it in "Lessons in Love" when Lance and Ilanca interupt her and Newton when they were about to kiss.
The goth girl Kristin and Jason were Ship Sinkers for the pairing of Ilana and Lance in "The Ballad of Scary Mary". Although we may be mistaken given "Under the Three Moons", though the dance they shared seemed to have platonic connotations. Seems a bit odd to think that just because Lance and Ilana met two others they clicked with, doesn't exactly mean anything unless they both become regulars like Kimmy.
Octus and Kimmy in "Under the Three Moons." Maybe.
Ship Tease: Despite Genndy intending for Lance and Ilana's relationship to be platonic, there's still a lot of this between the two of them.
Shirtless Scene: Lance at night, and you can hear the fangirls from fifty miles away.
Shooting Superman: General Steel's solution to everything is More Dakka. It hasn't occurred to him yet that blowing stuff up doesn't work most of the time and/or makes things worse.
Space Whale Aesop: Ilana's lectures about following the rules would make a good Aesop if she chose rational examples. Instead she references her string of bad luck (which was not her fault), goes nuts about following the rules, then has to break them to save the day. Then again, that could be the entire point.
Spell My Name with an "S": The credits of "Phantom Ninja" reveal that the alien enemy's odd name is actually spelled "Xeexi", but the TV captions spell it as "Xishi", which has become the accepted spelling among fans.
Sphere of Destruction: The fight between the Titan and the monster in the first episode results in a spherical blast that wipes out an entire section of the city.
It's done again in episode 16, when the bridge he and his opponent are on is blown up.
Stood Up: Octus starts every date with Kimmy, but the Rift Gate always causes him to have to bail or no-show on her. The last straw is when Octus promises —and fails to show— the night of the Homecoming Dance, in "Under The Three Moons".
Stupid Sexy Flanders: Octus has one of these moments regarding Lance in "Phantom Ninja". When Ilana remarks that she doesn't get what the girls at school see in Lance, Octus replies:
Octus: Dark hair. Bedroom eyes. Moody demeanor. I totally get it.
Tanks for Nothing: General Steel's default response to a threat is to throw tanks at it. This never works, of course.
Tar and Feathers: "The Ballad of Scary Mary", although it was probably a substance like molasses rather than tar.
Technology Porn: Titan qualifies, and its transformation sequence in the first episode is especially detailed.
Teens Are Monsters: Everyone at the trio's high school are jerks. It takes twelve episodes for the three to have a conversation with someone that isn't filled with scorn.
That's No Moon!: In Tashy 497. Modula's ship is shown landing on a Death World where his Robeasts come from. During one of the establishing shots, a nearby mountain range suddenly opens its eyes as the ship flies past.
They Clean Up Nicely: We knew Ilana looked pretty in formal wear, but Lance (after giving the suit his own take) and Octus (after deciding to alter his shape a little) also do.
Tim Taylor Technology: In Episode 19, Lance attempts to revive Octus by connecting him to the electrical systems of a motel for "more power". Later, he attempts to try the same strategy with the H.M.E.R.'s power source instead.
Title Drop: Octus first refers to the trio's robotic warrior as the Sym-Bionic Titan after Ilana mentions that the media has dubbed it with the name.
Unstoppable Rage: Lance after Octus' death. To explain: He took over G3's ship and let loose everything in it had into the monster and the space station, vaporizing it completely. Even Solomon, who is just as Bad Ass as Lance is, knew it was a good idea to stay out of his way despite the fact his ship had just been hijacked.
After Hobbes is wounded during the Mutraddi invasion of Galalunia, he is taken away for medical treatment and is never seen again.
The mysterious man who Solomon reports to and later fixes Octus.
The entire population of Galalunia.
What Measure Is a Non-Human?: It's apparently quite OK to tear apart the bad guys as long as they're the monstrous Mutradi, but Ilana immediately orders Lance to use non-lethal force once they discover that the humans look just like them (never mind that said humans were attacking them). Sure, their enemy may be monsters and easy enough to tell apart from natives, but it leads to Fridge Logic (and Fridge Horror) about the possible massacre that might've happened if they had landed on an equally innocent planet with inhabitants who look less than human/Galalunan. We find out later that they were sent to Earth specifically because they looked so much like Galalunans... but the masks the soldiers were wearing and their "shoot first, ask later" attitude didn't help.
What the Hell, Hero?: Octus calls out Lance for his vigilante antics. Later, Ilana calls out Octus and Lance for trying to forge a driver's license.
Whole Episode Flashback: "Shadows of Youth" and "Escape from Galaluna", featuring Lance's academy days and the invasion of Galaluna, respectively.
Would Not Shoot a Good Guy: After some early misunderstandings, Lance and Ilana try their absolute best to minimise casualties during their run-ins with G3 and the US Army.
You Are in Command Now: Modula kills his lead scientist after his latest Mutradi fails to work as intended. He then turns to a random computer tech, promotes him, and declares that the same will happen to him if the next monster fails.