Posthumous Narration: It's presumably Waku's voice that we hear in the opening of epsiode 1 where said voice talks about the game as if it's already happened.
What You Are in the Dark: Ponders this concept. After his father didn't go to his championship game, he started to wonder why he was playing soccer, and took a break from it for a while. When he's chosen to pilot Zearth, he decides it's an opportunity to be the hero even if no one is watching him.
Anti-Hero: Type V. He intends to save the world, but is not only not troubled by collateral damage, but sees it as desirable Except for his father, that is.
Cain and Abel: Cain to his brother (or brothers in the manga), who are considerably more responsible and ethical than he and his father are.
Creepy Child: Nicely demonstrated when he says that he somewhat respects Ushiro because he knows what it's like to kill someone, as he accidentally pushed Waku to his death (or so it seemed at the time).
Jerk Ass Has A Point: He says the kids will have to get used to killing, since it will become very common for them. Then comes the realization that not only are the enemy robots piloted by humans, but for every enemy defeated, a universe is destroyed.
I Will Wait for You: A major part of the reason why he doesn't take his siblings and move in with his uncle is his belief that his father will eventually return, and that he wants him to be able to come home. His father does come back in the manga.
Last Request: In the anime, he asks Koyemshi to hide his body, and asks Ushiro to treat Kana kindly before he dies.
Numerical Theme Naming: He and his siblings have references to numbers in the names in the order they're born- Daiichi (oldest), Futaba (second), Santa (third), and Yoshi (fourth).
Awesomeness by Analysis: In the anime, he figures out that the enemy robots are piloted by humans when his strategy to trick the robot into exposing which half is the half with the cockpit by defending himself and going after the one that didn't attack him works.
Achilles in His Tent (In the anime, after surviving his first duel by pretty much driving the other pilot to suicide, he seriously ponders not returning. When he sees that his family and specially his mother is doing well, though, Kirie comes back to the fight, wins his duel, unmasks Youko and then dies.)
In both versions, he has his doubts about fighting to begin with (his first battle in the anime, his only battle in the manga), since he's the first to find out that he's fighting with the existence of other Earths on the line. In the manga, after a talk with Misumi discussing how we live on because of the sacrifices of others, and after the above events in the anime, he regains his will to fight.
Bad Liar: In the anime, his pilot mark appears on his face, unlike with most of the other pilots, who could hide it under their clothes. He tells his mother that he hit his head, and Ushiro says that she wouldn't believe a lie like that.
Beware the Nice Ones, manga only: Kirie stabs Hatagai in the stomach after he offers him to teach him his way of life
Lonely Rich Kid: Mainly in the manga, when having an admiral for a father meant that she was very lonely until she met Maki. By contrast, in the anime, Maki once points out how well she gets along with everyone else.
Calling the Old Man Out: Defied in the manga. She's less than happy with her father's repeated absences, hoping to become an Idol Singer in order to see him on television, and believing he's only talking with her to find out more about Zearth. Then after she gets her legs burned off by acid while saving Youko and Akira decides to keep filming, Youko yells at Akira, saying "And you call yourself a father?", but Anko tells Youko to calm down. Her last words are that she learned how to give a Rousing Speech to Earth by watching her father on television.
Caught with Your Pants Down (By Koyemshi, in the manga. It wasn't anything sexual, mind you! Just her indulging into her Idol's fantasies.)
Dance Battler (Manga only, where she uses her dance experience to catch upon her elusive opponent)
Dark-Skinned Blonde (Partially. Her hair is light brown, but her skin tone is darker than the other kids)
Death Glare: In the anime, she gives one to Machi, as she is still angry about her being outed as the uncontracted pilot and being responsible for getting them into the game, when she tries to offer advice during her battle.
She dies in her father's arms in the manga, but not smiling.
Freak Out (After the aforementioned incident with Youko, Koyemshi punishes the girl by choosing her as the next pilot. Understandably, she shuts down. And then she gets better)
Idol Singer (What she wanted to be, at least in the manga, as a way of being able to connect with her father on television.)
Out of Focus (In the anime. She didn't received as much attention as other pilots during her episode, which focused a great deal of time on the media exploits regarding Zearth. Her TWO crowning moments of awesome were also missing on the adaptation.)
Plucky Girl (Specially in the manga, where she continues fighting even after having her legs burned off)
Precision F-Strike: In the anime, immediately before running over and repeatedly slapping Machi for her role in recruiting everyone into the game.
Ship Tease (Her interactions with Kanji in the anime can be seen as this, to a degree)
Stepford Smiler ( In the anime, when her dad is caught in an affair and her mom goes Lady Drunk mode, Anko hides her distress at both this and her position as the next pilot. She acts happy and sweet, but when she and her friend Kanji are alone, she cries in his arms.)
Taking the Bullet (In the manga, she pushes Machi out of the way of corrosive substance that an enemy robot injected into the cockpit. Because of it, she got her legs burned off.)
Alcoholic Parent: In the manga. It turns out that it's for the Youko from this universe, in a rare case of people having selves in alternate universes.
And This Is for...: Dedicates one of her gunshots on Koyemshi to Yuu, Kokopelli's daughter and one of the victims of Koyemshi's manipulation.
Becoming the Mask (She was raised in our Earth, comes to truly love our world and, in the anime, she sacrifices herself for us. Her crush on Ushiro helps a bit, too.)
Dead Person Impersonation: In the manga, during the live broadcast from Zearth's cockpit, she has to impersonate Komo, who was the only other identified pilot of Zearth, as the official story is that she and Anko are the only pilots.
Dying Alone: In the anime, She passes on with only the remains of Koyemshi nearby, after saying goodbye to Ushiro and Kana
Gallows Humor: In the manga, she jokes about assassins coming after the pilots after the boy who claimed to be a Zearth pilot is shot dead; it is implied that the families of those killed in Zearth's battles helped that happen. She ends up being killed that way herself.
The Generic Girl: Played with in the manga. Every tankobon begins with a list of Zearth's pilots, complete with short descriptions. Throughout the series, Machi remains "That girl with the freckles." Ultimately subverted. She's far from generic.
It's All My Fault (Blames herself for the whole mess as she's the one who brought the kids to Kokopelli's cave.)
Last Name Basis: The cast tends to call her "Machi," in contrast to the other girls, who are typically referred to by their first name or a nickname. She also uses most of the others' last names.
Not Funny Anymore (In the manga, Machi says the kids might have assassins sent after them, which is considered as a passing comment making some black humor about the situation. She's shot to death some episodes later, and Koyemshi has to kill her to ease her suffering.)
Walking Spoiler: She's hard to discuss without spoiling details from her backstory, her brother's, or the existence of alternate Earths.
Wham Episode (Before she can fight her battle in the manga, she gets shot in the head.)
What the Hell, Hero?: In the manga, accuses Akira of being unsuited to be a father when he continues to record footage after his daughter Aiko/Anko had her legs burned off by acid while protecting Youko. Anko tells Youko to calm down.
What the Hell, Hero?: Gets varying degrees of this over his treatment of Kana, especially from Maki. Tanaka also calls him out on suggesting that Daiichi is getting cold feet, saying that "Everyone's afraid."
Woobie, Destroyer of Worlds (In the manga, AND HOLY SHIT HOW! And for worse, it's not our world he's trying to single-handedly destroy - he has to kill every single inhabitant of the other Earth if he wants to save ours. And he does.
Yakuza Prince (In the anime, then subverted. His father Ichiro was a Yakuza heir, but after he was killed by his enemies, his mom Miko (later, Misumi Tanaka) gave Ushiro away to her cousin so he'd have a normal life.)
Adaptational Villainy: In the manga, he actually has some redeeming moments. Contrast when he puts Youko out of her misery and grieves for her in his own way in the manga, with him getting killed by Youko in order to save Kana from being forced into the contract in the anime.
Dirty Coward: There's the part where he physically forces a fellow pilot from his Earth to participate, only to break down and beg for his life when it's his turn, and his reaction when Youko is shooting him to death.
Nay-Theist: Manga only— Koyemshi believes that it's better to think of the mecha battles as natural phenomena and God as a yet-undiscovered law of physics, because "it's better that way" ... Probably because the idea that God might be behind the pruning is not a comfortable thought.
Pet the Dog: Koyemshi can appear nearly sympathetic in the manga, when he displays some signs of care for Machi.
There's also the talk he has with Ushiro just before the final battle of the manga, encouraging him and giving him a reason to fight for the ones close to him, including his still living sister, Miku Tanaka.
Robot Buddy: Subverted—Koyemshi doesn't always tell the kids things they really ought to know.
Sadistic Choice (His treatment of Kana and Jun by the end of the anime, when he tries to manipulate Kana into becoming a pilot and threatening her with forcing Ushiro to do so if she hesitates. Ushiro, however, had asked Youko for help behind his back, and she out-gambits and kills him)
Stern Teacher (In the manga he retakes his human form, becomes the new Kokopelli and goes to another Earth with Zearth. When he recruits the new pilots, he straightforwardly tells them that they'll die after piloting (unlike Garaku/Kokopelli, who couldn't bring himself to do so), but then he adds that he will be the first pilot and show them how to do it right, which triggers the Redemption Equals Death mentioned above.)
Shoot the Dog (has to put a mortally injured Youko out of her misery in the manga, which lets him show a slightly softer side.)
Can't Act Perverted Toward a Love Interest: A very disturbing example of this is applied in the manga; he claims that the fact that he has never had sex with his girlfriend, Chizu's older sister, is proof of his love for her. It only serves to make him seem even more vile.
Jerk Ass: In the anime. His manga incarnation is much worse.
Karma Houdini: Chizu backs down from killing him, and in the manga, her family doesn't believe they can legitimately press charges against him after Chizu killed innocent people in the pursuit of her revenge against him.
Hidden Depths: At first, he seems to be just another power-hungry army commander who is only interested in seizing Zearth for their own benefits. Once he learned what's at stake, however, his attitude quickly changed.
Adults Are Useless (Averted in the anime, where he works with other adults (Komo's dad, Kanji's mom, etc.) to find out what is going on and try saving the kids. In the manga he still tries to support Anko as much as he can.)
Reasonable Authority Figure (in the anime, he's a congressman. In the manga, he's in the military, and Komo talking to him is what gets the military involved)
Say My Name: In the manga, he screams his daughter's name as she dies.
Spell My Name with an "S" (He is Kouichi Komoda in the anime, and Tomoe Komoda in the manga. Those two versions could be considered separate characters altogether, as their character designs are different as well: Kouichi looks quite younger than Tomoe, to start.)
The Stoic: In the manga, it's pointed out that he does love his daughter, but is not very good at showing it.
Go Through Me (Attempting to snap Chizuru out of her Roaring Rampage of Revenge, she stands between Zearth's arm and Hatagai and tells her little sister to kill her instead, dumping the blame on herself. Chizu stops, but Ichiko can't save her from dying. In the manga, she knows that Chizu is there. In the anime, she shields Hatagai with her body, without ever seeing Chizu)
Horrible Judge of Character (she's dating Hatagai, 'nuff said. In the manga, she breaks up with him after she learns of what he did to Chizu; in the anime, there's no indication that she finds out about what happened to Chizu)
A boy who pretends to be a Zearth pilot on TV. He ends up being killed for it.
Cassandra Truth: It's obvious to the Zearth pilots and everyone else working with them that he's lying, but not the public; to them, it's more believable than the word of the rival newscaster's daughter.
In-Series Nickname: Anko mentioned the Zearth pilots coined one for him despite never having met him.
Spanner in the Works: By coming forward on TV, he essentially derails the main character's plans regarding Zearth in the media, largely because having the daughter of one of the reporters come forward as a Zearth pilot is less believable than what he says.
Walking Spoiler: His only appearance involves a somewhat significant plot twist.
Show, Don't Tell: In the manga, the viewer has a few pages of exposition on his habits. In the anime, you get to see him at a board meeting, with him saying that he wants to develop the area that was destroyed in Waku's battle, and slapping a subordinate for not closing a deal at its original terms.