The Ace: Godzilla is Zach's most preferred monster, and it shows when Zach beats the first 2 worlds and Pathos using only Godzilla. This is downplayed in later chapters when the bosses and even the environment ramped up in difficulty, forcing Zach to use his other monsters.
Alas, Poor Scrappy: In-universe, Mothra dies to the Final Boss first, and as much as Zach hates playing as her he feels it was a terrible way for her to go out.
Balance Buff: In Entropy, Zach learns that Mothra's eyebeams now deal the same damage as Godzilla's punches. Mothra is also able to fly over bosses when she couldn't in the original game, allowing her poison scales to have a better chance of hitting enemies.
Boring, but Practical: Godzilla might not have flight like Mothra and he may walk slower than Anguirus's rolling attack, but he has no real weaknesses and plenty of health to take on bosses with. And even though Zack admits Solomon is a better character, he still feels more used to Godzilla's style.
Flight: Mothra, natch. It's about the only thing Zach likes about her. This trait becomes necessary when airborne enemies/bosses appear and when the environment itself is too hazardous for land-based monsters.
The Fourth Wall Will Not Protect You: In-universe. Zach starts realizing something is really messed up the moment he insults Red and he responds by turning around to look at him. Things start going south from there...
Honor Before Reason: Sort of. Red is willing to use literally any trick he can to shift the advantage towards him, but he feels obligated to follow a loose set of rules and give Zach a chance to survive by allowing him to flee or in the case of his boss fight, allow him to actually fight back. It's possible however that he wants to break the rules, but the consequences of breaking them are too great to be worth the risk... until the end, where it's the only way to resolve a stalemate he deliberately set up.
Unskilled, but Strong: DEFINITELY. He's immensely powerful, mostly making up for the fact that he's kind of a moron. Whilst not as mindless as, say, Godzilla, he's not an intelligent planner and doesn't always consider the consequences of his actions, as evidenced by everything about Acacius' availability. This doesn't make him ineffective per say, but it does hamper his effectiveness to a degree.
Blue and Orange Morality: Face doesnt seem to be able to understand human morality and his reactions to Zachs answers to his questions are rather incomprehensible.
Bread, Eggs, Breaded Eggs: The last three questions of Face's first quiz. "Do you like dogs?" "Is the president good?" "Does your dog like the president?"
Bread, Eggs, Milk, Squick: He'll go from silly or absurd questions to very disturbing and personal ones. His first two questions in the third quiz are "Do you like ice cream?" and "Do you like clowns?" before he starts asking things like "Is it safe to go out at night?" "Have you ever killed anyone?" and "Do some people deserve to die?"
Character Select Forcing: Forces Zach to use Mothra on Entropy. Justified, though, since its impossible to use any other character.
Hidden Heart of Gold: Face's more disturbing questions are sort of intrusive towards Zach (asking if he's been raped isn't a question people would ask about). But he's ultimately on Zach's side, even when he takes Godzilla and Anguirus, leaving only Mothra.
Inhuman Emotion: Out of his 23 different expressions, 12 of them see to be this, with changes like Face's sprite flipping upside down, turning into a cyclops or looking like a clown. Two of these expressions only appear once, after the questions "Do you like ice cream?" and "Are you a tough guy?"
Plot Tailored to the Party: Starting from Dementia face gives Zach monsters that counter bosses and gimmicks of a specific world. Anguirus is unlocked in Dementia, where his speed enables him to move underwater quickly and stood a better chance at bosses who are notably faster than others. Inverted with Mothra, since some of the levels are impossible with other monsters but Face removes Godzilla and Anguirus to force Zach to use her. At Extus Solomon's strength and variety of abilities allows Zach to complete very difficult levels and a chance at defeating Chimera. Acacius was given in Zenith to give Zach a shot at killing Red's giant form, but is only usable after the other monsters are killed.
Plucky Comic Relief: Face usually provides most of the humor of the story, but it's averted during Entropy when his questions took a darker tone and forces Zach to use Mothra at the end and Zenith because Red killed him.
Starfish Aliens: He seems to reside in a plane of reality where water is either uncommon or works differently from our water, since he has to confirm with Zach "Is water wet?"
Emotionless Girl: According to Zachary, whenever she went into her "episodes", she would speak in a monotonous voice and keep a completely straight face.
Our Angels Are Different: Although specified as being one in-game, she bears more of a resemblance to a half-finished statue. She has no wings and no facial features other than her blue eyes.
Was Once a Man: Melissa was Zachary's deceased girlfriend who suffered from implied schizophrenia, which lead to her accidental death. The game implies she was resurrected within the game and was able to provide closure to Zachary after he beat Red.
11th-Hour Ranger: Only appears in the last world. And he can't even be accessed until Red breaks the rules, allowing Melissa to make him available.
Ambiguous Situation: Carl plays the game for whatever reason knowing the sinister nature of the cartridge through Zach's playthrough. As of Chapter 5 his motives for doing so remain unknown.
Ascended Extra: Just like Angurius, Rodan was a scrapped playable monster in the original version. Here he's one of Carl's main monsters and presumably a replacement to Mothra.
Out of Focus: Rodan's moveset is notably less fleshed out compared to the other extra monsters other than the fact he can fly and is capable at close quarter combat. He doesn't display any kind of special attack on screen despite clearly having one.
Guest-Star Party Member: His only appearance is in Chapter 5 before it's revealed he's actually Warlock in disguise
Affably Evil: Rather polite as far as antagonists can go. He actually gives out warnings, and when attacked initially he simply parries the blow without a counterattack and leaves with one last warning. Even when retreating from a lost fight, he takes a moment to tell the player he fights well, even if it matters little.
Authority Equals Asskicking: Described as a 'Malformed Despot' and is capable of dishing out huge amounts of punishment, even killing someone who helped the protagonist in a single shot.
The Chessmaster: Shaping up to be one; he's definitely more of a planner than Red was, and his one trick so far, impersonating a playable character to keep the player from progressing, had Carl fooled for a decent while.
Lawful Evil: Is he a villain? Yes. Is he unquestionably vicious and cruel with his punishments to traitors? Absolutely. But he also displays a strange code of honor, giving Carl two separate opportunities to leave before attacking him personally. Contrast to Red, who regularly attempted to kill the protagonist's monsters and was full-on Chaotic Evil.
Meaningful Name: A warlock is the male equivalent to a witch, and Warlock certainly seems to use some kind of magic.
Nightmare Face: Like Red, his is always grimacing. It also keeps the tribal theme, heavily resembling an Easter Island face.
Our Mages Are Different: His name implies this; he seems to use some kind of magic, but he's also a kaiju and doesn't use any sort of catalyst.
Reality Warper: The color palette changes when he shows up to shades of a dull grey.
Voluntary Shapeshifting: At one point he shifts into King Caesar to prevent Carl from getting to the boss of the level.
Adorkable: A (comparatively) small creature that is nothing but nice and helpful to the protagonist.
Kaiju: Make no mistake; he may be noticeably smaller than Godzilla and Rodan, but he still dwarfs humans in size.
Morality Pet: Seems to be this for Carl, in a rare heroic example. Carl is always happy to see him and whenever he's upset/in distress, Carl's first instinct is to either comfort him or help him. He's the one character Carl shows anything other than mild curiosity for, and when he gets kidnapped, Carl is thoroughly pissed.
The Woobie: All three times we see him so far. He's lost in a maze, and then his home is gone, and then his family might be dead. Invoked when Carl notes he "can't help but feel bad for the little guy". And then, to make matters worse, he gets kidnapped. Poor guy just can't catch a break, huh?