Aliens Are Bastards: Aliens abduct people and experiment on them, which includes cutting them up and using them for spare parts. Aliens kill people and replace them with clones to manipulate the governments of countries throughout the world. Aliens abduct powerful individuals and alter them into trenchards (half-alien hybrids) to force them to work for them. And the list goes on and on.
Animal Motif: Both Ryougas think that Ranma has a Tiger motif.
Back in Dark Titans, Jinx was rather insistent that she didn't have a cat motif. Somewhere along the line, she seems to have changed her mind.
Anti-Hero: DT Ryouga, Raven, and Ranma are types II, but Raven is quickly marching downwards lately. Since arriving in the X-COM-verse, she's lost her telekinetic powers, but gained the ability to possess the enemy to turn them into kamikaze meat-puppets, and telepathically deliberately inflicted extreme pain on a good friend (Cyborg). X-COM Ryoga is either an extreme type III or a type IV.
Ape Shall Never Kill Ape: The aliens are all linked to the Mind, making it impossible for them to turn on each other (unless they are freed from the Mind's control or something else overrides it).
Arbitrary Skepticism: As X-COM is dealing with increasing numbers of delusional psychics, it takes a while to realize that the Titans are potential allies rather than alien dupes. Their first response is thus Let's You and Him Fight; a command to surrender to their authority, with a warning that they will Blaster Bomb them rather than let them wander around.
Armor Is Useless: While X-COM's armor may protect its soldiers from a glancing blow, the alien weapons are powerful enough to easily tear through it if they land a direct hit. Or even an indirect hit, in some cases.
As if to emphasize this, Starfire takes a direct hit, which eats completely through her armor, yet only leaves her with a sunburn. Apparently, Tamaraneans are pretty much immune to the weaponry used by the Mind.
Arson, Murder, and Jaywalking: RLOADR Nabiki's consistently hardcore psychopathic acts and nature were initially given a Hand Wave as being on the same level as illegal downloading; which is generally simply morally neutral when it causes no harm, and grants a bonus much larger audience who would never have seen the work otherwise; whereas indifferently selling somebody who had saved your life into sex-slavery... is not.
Brick Joke: Back in Dark Titans, Ryouga and Cyborg have a conversation about the T-Brella Cyborg made for Ryouga. Most of the conversation consists of the words "Helicopter Option" (much to Robin's annoyance). It is then never mentioned again in all of Dark Titans. However, after the fight with Saffron, as Starfire is plummeting helplessly from the upper atmosphere toward the ground, we get this:
X-COM Ryouga: "Don't tell me. Your Ryouga… His umbrella. Does he really have something crazy like that?"
Possibly a very loose, some generations-removed, memetic leftover from the popular online or GTA style: "If you are willing to accept the unavoidable realities of eating animals, you have to be willing to murder, eat, and put anybody in a genocide camp, or you're a hypocrite, as benevolence has to include all or nothing, and as all is impossible per definition you should all become casual spree-killers, or you are all horrible people" rationale.
This despite that her teammates would have preferred to use non-lethal force against the alien war-breeds as well, but they were conceptually designed to be impossible to use it against, and near impossible to even keep alive in confinement to boot. However, she also makes a valid point about that the term "inhuman" is contradictory, as there will always be some human perfectly willing to commit any level of atrocity.
The psychologist that Starfire spoke to, stated that UNETCO members who started to not find the act of murder unpleasant and actually greatly enjoyed it were sensibly weeded out of the organization, yet Shampoo is also portrayed as being extremely sexually stimulated from playing sadistic hunt-games with completely outmatched prey (including previously doing so for sport and training at the age of 13, against non-superhuman opponents), and then enthusiastically slaughter them in as brutal manner as possible, and she is still there without anybody batting an eyelash.
Brought Down to Normal: Not quite. Raven starts losing her telekinetic abilities due to being separated from Trigon's presence, but trains up her telepathic abilities to make up for it.
Cast from Hit Points: Jinx's power was this, but she was so used to using it that she didn't notice.
Central Theme: Set from the beginning chapter with Inu Yasha, and being that we all have to wake up and not spend our lives in a coma, which is sympathetic in theory, but the early execution reads more like: "Wake up and smell the rotting corpses, burning ozone, absolute savagery, and infinite abyss of despair and entropy!", which is probably not the best approach. It turns much better on that front though.
Chekhov's Skill: An indirect example. Early on in TALB, Cologne enlists Starfire's help to teach Ryouga the Hiryu Shoten Ha but doesn't bother to teach him the basic steps, saying that Ryouga already knows how it's done because he helped Ranma develop the same skill earlier in the main series. Sure enough, Starfire winds up using the techniques she learned by training with Ryouga to perform her own Hiryu Shoten Ha before the series is over.
Back in Dark Titans, Starfire mentions having a discussion with Ranma regarding the workings of the Hiryu Shoten Ha. Then, in her fight against Herb, she uses the Hiryu Korin Dan, a variant of the Hiryu Shoten Ha developed by Ranma.
Since Dark Titans, Ryouga has been experimenting with Earth Elemental Ki, which manifests as a yellow aura. This is how he defeats a crazed Ukyou empowered by a Green Lantern ring, as Green Lantern rings cannot affect the color yellow.
Combination Attack: The Hiryu Shoten Ha generated by Ranma and Starfire but powered by Ryouga and Ryouga's shishi houkodans.
Crapsack World: The galaxy is ruled, rim to core and pole to pole, by an evil Hive Mind. Humans might be able to destroy the local node if they become The Unfettered - abolish every civil liberty and article of war. And there's another, unattached(albeit slightly less advanced) node in the Gulf of Mexico. And its destruction would reduce Earth's biosphere to the algae level.
Not to mention the space hulk dimension. The dimension acts as a trap, sucking in anything that attempts to hop to a different dimension from adjacent dimensions while making leaving difficult, rogue nanobots seek out functional machines and drain the power from any that they encounter, corrupted Nth metal creates zombies from the corpses of organic beings that die nearby, potentially useful abandoned space craft rot away while corpses are perfectly preserved, and simply being in the dimension for too long causes people to have hallucinations, mood swings, and to eventually become murderously insane.
Dangerously Genre Savvy: Nabiki, who quickly realizes that a super-hero fight is inevitably followed by a team-up against a foe neither group of heroes could deal with alone. So she starts trying to recruit the lost Titans.
Dark Is Not Evil: Raven, especially after trading in her telekinesis for mind-control abilities. Of course, given that she is now presented as a massive force of pure nihilistic entropy, the "not evil" part is turning iffy.
Deadly Nosebleed: Raven, Ryouga, and Mousse all suffer them after attempting to use psychic attacks on Slade.
Determinator: Pretty much all of the Teen Titans, India Squad, and Juliet Squad, but special notice goes to Jinx and Akari. They go on a hundred kilometer dash to the nearest city through a snow filled forest while fighting off armed aliens, fending off mental attacks by an Ethereal, and fending off large tracking monsters that were raised by Akari herself, and all while dressed in a manner unsuited for the environment. Then, when Akari's operation is sabotaged by X-COM Ryouga, Jinx immediately joins the Titans in a mission to hunt down and capture an Ethereal so that they can replace the brain Ryouga destroyed, all on the off chance that the operation will save Akari's life without returning her to the Mind's control.
Differently Powered Individual: Rogue psychics. X-COM-style psionics that, like the aliens, can use their abilities without psi-amps. That the aliens created but can't replicate in Ethereals. And let wander around freely until X-COM hunts them down. They're the justification for attacking the Titans on sight. Most are repeat abductees. Enhanced Martial artists have only recently fallen into this category as well, as the aliens turn their attention on this much smaller study population.
Evil Twin: What both Ryougas assume the other to be. Titans Ryouga genuinely is nicer though, and is as disturbed about the Sociopathic Soldier aspects as most people would be in seeing a killing-machine version of themselves, but is initially too idealistic to be efficient in the X-COM world, so he has to adapt. His counterpart is more mature however, but mistakenly thinks that his "brother" is simply jealous of him being stronger.
Full Potential Upgrade: Cyborg is making one for Yankee Squad. This includes more armor than usual since most of Yankee Squads members are significantly stronger than the standard X-COM member and can handle the extra weight, as well as specialized weapons designed for individual members.
Game Face: Raven does this early on when she lets her anger take control during the fight with her and Ryouga against X-COM.
He Who Fights Monsters: X-COM uses tactics that would be considered war crimes against any nation on earth. Fortunately for them, aliens have no rights. X-COM Ryouga uses killing techniques and possesses an evil ki. However, he makes a compelling argument to Titans Ryouga about that Titans Ryouga will also always easily turn moody, angry, and depressed, as that is how they are fundamentally built, and that it is better to learn to handle that than only pretend that they don't exist.
While technically not a Heel Face Turn, Shampoo and Titans Ryouga, who originally antagonized each other whenever possible, ended up becoming close friends after receiving the memories of a Shampoo and Ryouga from another dimension who were a couple while inside Heresiarch. Although they were arguably drifting toward a Fire Forged Friendship before that.
Heel Realization: While technically not a heel, X-COM Ryouga feels rather uncomfortable when compared to the much less morally questionable Titans Ryouga. Especially once he finds out that Titans Ryouga has had nearly as rough of a life as him.
Heroic BSOD: Titans Ryouga, after Raven puts Jinx in a coma.
Heroic Safe Mode: Titans Ryouga, after Jinx wakes up and it is revealed that Raven also undid the Headmaster's influence, removing Jinx's love for him in the process.
It's implied that he sometimes slips back into a Heroic BSOD when he isn't being actively distracted.
Humans Are Bastards: After her literally explosive entrance into the world of The Road To Cydonia, Starfire does her best to save everyone from the collapsing clock tower, and manages to prevent any casualties. She is then attacked by the police, then the Chinese army, and finally by X-COM. After being captured and interrogated, they proceed to Mind Rape her. Upon discovering that she isn't lying and really is from another dimension and not with the Mind, she is recruited by X-COM as if nothing happened. She then watches as X-COM employs the exact same tactics as the aliens against the aliens, barring what circumstances prevent them from doing. She also watches all the human propaganda X-COM spreads throughout their base to keep up morale. All while being told that, as an alien, she basically has no rights and, if the Titans can't get home, she will essentially be a prisoner for the rest of her life. It's little wonder that she wants to get home as soon as possible.
Inferiority Superiority Complex: Titans Ryouga keeps picking fights with X-COM Ryouga and shows off his moral superiority every chance he can get. The reason: he hates himself, and sees X-COM Ryouga as everything he thinks is wrong about himself in a conveniantly seperate package.
Inhumanable Alien Rights: It really sucks to be an alien in the X-COM-verse. Even if you're an ally of X-COM. Poor Starfire.
Also, if Trenchard Akari weren't already an enemy of humanity, the torturous experiments X-COM has been putting her through probably would make her one.
Interrogated for Nothing: Starfire. X-COM has even less use for Presumption of innocence then they do Mind Over Manners. When their initial mind probe reveals only incomprehensibly idealistic superhero memories, they subject her to one designed to destroy "false" memories. Mind Rape doesn't even begin to cover it, as this more invasive process is essentially 2 + Torture = 5: answers X-COM doesn't want to hear are punished with all-consuming psychological agony. After turning Star inside out, they realize that none of her memories are false, then forcibly recruit her with as much regret for the process as a 15th century witch hunter would for drowning a midwife.
It Amused Me: The most common reason that Jinx tends to harass people.
Ki Attacks: Now in two flavors - emotion based ki and elemental ki.
Let's You and Him Fight: As TRTC is having a plague of delusional psionics who don't need Amplifier Artifacts when the Titans show up, their world's first response to weirdos in spandex is to give a warning to surrender then attempt to incapacitate, and escalate from there. Interestingly, Cyborg never fought X-COM as he was initially assumed to be a human criminal (a local law enforcement matter) and Jinx ran into the aliens first. The others were assumed to be alien terror units or infiltrators.
Light Is Not Good: Traditionally, phoenixes are portrayed as holy symbols of life, light, and hope. Not Saffron. Especially disturbing symbolic imagery when set against Raven's entropic chaos and nothingness.
Loophole Abuse: To keep X-COM from Taking Over The World, they are bound by the vaguely-worded Section Seven clause:(Paraphrased) "No extraterrestial technology is to be used against terrestrial combatants" AKA no using energy weapons, power armor, or psi-amps on humans. The instant the X-COM-verse Nerima Wrecking Crew fell into X-COM hands, they were formed into India and Juliet squads, their purpose being to attack civilians X-COM is forbidden by treaty to harm. They currently spend their time attackingSirius Group operations and hunting rogue psychics, but there is absolutely nothing keeping X-COM from having them assassinate uncooperative world leaders or even destroying military sites(they rip through entire armies like a chainsaw through wet tissue paper during the invasion of Korea in The Road To Cydonia) with canonical terrain-wrecking ki abilities which they have improved on.
Loss of Identity: Seems to be one of Titans-Ryouga's fears. He doesn't want anyone removing the fake memories Brother Blood implanted him with, since even if they're fake, they're part of what makes him him.
It's part of how the Mind controls its Trenchards.
Made of Indestructium: The alien alloy is fairly close to indestructible, barring plasma attacks. Or Titans Ryouga.
Made of Iron: All of the Nerima Wrecking Crew. Unfortunately, that's not enough against lasers and plasma weapons.
Special notice goes to Cyborg and Starfire, who are indestructible enough to survive attacks by lasers and plasma weapons. But not without taking damage.
Meat Puppet: Raven switches to possessing enemies when her telekinesis starts to fail her.
Mind Rape: X-COM attempts to use a machine to destroy the false memories implanted within Starfire's mind so that they may discover what the Mind is actually up to. Except none of Starfire's memories are false.
No Nonsense Nemesis: X-COM in general, but special mention goes to Shampoo. Upon being betrayed by Tresspasser, she immediately attempts a kill strike. Afterwards, once she verifies that Ukyou is also betraying them, she responds by blinding her.
No Sense of Direction: Every single Hibiki in the story. This is played for laughs often, and many jokes are had at their expense.
Not Quite Saved Enough: Despite Ryouga breaking free of Raven's mind control in time to rescue Jinx, then managing to get her to the ship quick enough to save her life, it turns out that Raven already erased her love for and memories of her relationship with Ryouga.
Nothing Is the Same Anymore: Even if the Titans manage to get back to their world, they've definitly been changed by their time in X-COM. And for most of them, not for the better.
Off The Chart: Raven's psychic ability after abandoning her Trigon based powers. The machine just lists her as "Double A".
Only Mostly Dead: Raven survives having her heart mulched by Tresspasser thanks to a Father Box.
The "Road To Cydonia" counterparts of Ryoga and Ranma have been willing to kill armed, though extremely outmatched, non-superhuman opponents in battle, whereas the originals were firm Bully Hunter types.
Konatsu, whose entire point was that he had no natural urge to kill whatsoever, and had to be drugged by magic to get any, constantly runs dozens of graphic combat scenarios in his head. He still typically opts for the one that does the least harm to his opponent, human or alien.
A much smaller issue is that Ryoga, whose entire point during the manga was that he liked Akane because he mistook her for a super-strong Kasumi with the same interests as him, was then paired off with a girl much closer to his/their actual ideal, sans the superhuman martial arts (Akari). Nevertheless, X-COM Ryouga is in a relationship with a mischievous psychopath (Nabiki), and DT-Ryouga with a much less extreme sociopath version (Jinx), although he initially ended up attracted to her because of mind-control.
Shampoo seems to feel that this may be happening to her since the arrival of Yankee Squad, and she isn't happy about it.
Every single psychic in X-COM when compared to Raven. She outdoes them, and doesn't need a psi-amp to do it. There are a few psychics who are as strong as her though, including Saffron, but all of them are insane.
Personal Horror: Both Ryougas, mainly due to exposure to each other. One reminds the other of all the mistakes he's made, the other makes the first realize just what he's done to himself for the sake of revenge.
Initially, in Titans and the Lost Boy, Ryouga (and by extension, the rest of the Ranma crew), as well as Starfire and Cyborg are all drastically reduced in strength. As the story progressed, the author has been slowly been bringing them back up to their levels displayed in the animated series source materials. Ryouga and Starfire are represented as close in strength as a conscious choice by the author, as, although her greatest blatant feat of strength was far beneath manga Ryouga's, she was sometimes able to challenge Cyborg. Cyborg, whose top showing in the animated series include tearing up an office building and using it as a bludgeon, which matches Lime keeping open a closing ravine, is presented as ten times stronger than either of them. It would be about 3 times stronger compared with manga Ryouga, but that may be irrelevant.
Since the author is using the Ranma anime and Titan's animated series as alpha canon (for observable combat feats, as opposed to trying to extrapolate from static page images), and the Ranma manga and Titans Go comic as Beta canon, quickly followed by the DCAU and other animated DC shows as third canon, followed finally by the actual DC comic lines for the lowest level of canon, this means that although the speed and skill feats for the Ranma crew are still superior to the Titan's cast, unlike the manga's supersonic speed and unearthly skill, it is not by an insurmountable level. Again, this was done as a balance issue, as the manga has showings far in excess of those shown in the anime, although comics Cyborg and Starfire were actually usually presented as far less physically extreme than their (much more compelling) animated series counterparts.
Starfire: "You may burn like the heart of the volcano itself. But I. I- I burn like a star!"
Psychosomatic Superpower Outage: Starfire's Mind Rape. In Dark Titans, Starfire exhibits far greater levels of power than Reflections. Though upon her entry to the X-COM-verse, she is able to singlehandedly stop a dozens-of-stories high clocktower from collapsing, she quickly has to face three Sociopathic Soldiers with Dragon Ball-level powers while she is still in Thou Shalt Not Kill mode, who recognize her hesitation to kill and take full advantage of it to beat her into a short-term coma. After X-COM's initial Mind Probe only produces "obviously false" "superhero" memories, they subject her to 2 + Torture = 5 to get the "real" memories... but instead succeed in proving the "false" memories true. The point? Tamaranians in general and Starfire in particular have Personality Powers; To fly she must feel "unbridled joy", to throw starbolts she must feel "righteous fury", and to utilize her superhuman strength she must feel "boundless confidence". She now has enough "righteous fury" that her starbolts are able not only to incapacitate the Arrogant Kung-Fu Guy who gave her to Mind Rapists with ease but initiate a nuclear explosion through sheer force of will, blowing Saffron(an immortal capable of vaporizing a mountain) away in a single Heroic RROD. However, despite her ability to fly FTL in the animated show, the comics and in Dark Titans, she has been dropped to sub relativistic speeds in regards to Reflections as she lacks the "unbridled joy" to go FTL or the "boundless confidence" to pick up a skyscraper while she's forced to work for said Mind Rapists. In short, as X-COM's slave, she's something of a Glass Cannon.
Redemption Quest: Jinx is going through one, and doesn't come across as particularly extreme to start with compared with some of her allies.
Ryouga has arguably been on one since joining the Titans.
Relationship Reset Button: Ryouga ended up being paired off with Jinx, due to a combination of growing closer with Jinx and feeling too guilty to start a serious relationship with Raven. Then Raven went nuts, nearly Brainwashed him into being her love slave, and erased Jinx's attraction to Ryouga. Now in Ryouga's eyes, he and Raven are "even", and Jinx isn't attracted to him anymore. Congratulations, Raven, you've just set everyone except Starfire back to square one.
Repower: After being separated from Trigon due to being in another dimension, Raven's powers from Trigon begin to fail, leaving only her telepathic abilities. So she learns to use her remaining psychic abilities like X-COM psychics. And promptly outclasses them.
Ship Sinking: Ryouga finally came clean to Akane about being P-chan before the story began and got a chewing out to the tune of "I never want to see you again!"¯ for his courage. While Akane later felt bad about her reaction and apologized, by that time Ryouga had moved on and started to form his own Love Dodecahedron.
The Shrink: Psychiatrists are repeatedly mentioned throughout the story, and apparently all of X-COM regularly sees them. We even get to meet one in the form of Dr. Phillips.
Villain Protagonist: X-COM Shampoo. X-COM Nabiki appears comparatively Heel Face Turn most of the time due to her near Fate Worse Than Death experience, but allegedly plans to start her own world-spanning war-profiteer and mercenaries-for-hire organisation, which would turn her much worse than DT Nabiki/a more extreme version of Balalaika). Jinx kind of qualifies to a degree, but she is genuinely improving, and was simply a burglar, not an assassin.