Drama-Preserving Handicap: In the movie, because his assimilation process is so far gone, there's a big chance that he'll be assimilated within minutes of piloting the Mark Sein. This along with essentially being removed for most of the last part of the movie, prevents him from piloting and easily defeating the Festum army, leaving the defense of the island to his friends.
Handicapped Badass: By the end of the TV series, he's nearly blind. In the movie, his assimilation process has reached the point where if he pilots the Mark Sein for more than a few minutes, there's a high chance he'll be completely assimilated.
Worf Had The Flu: In the movie, he sortied to face a Sphinx-type Festum, which quickly mutated into a new Aeolus-type, which is capable of mimicing and using human weapons, including Fafner weaponry. Kazuki ended up having an extremely difficult time, mainly because his assimilation process started up and he was struggling to fight back from being assimilated.
Failure-to-Save Murder: Blames Kazuki for not being able to save Shoko despite that it was clear that there was no way that Kazuki could have caught up to Shoko's Mark Sechs since it was actively flying 'away' from him the entire time.
Put on a Bus: In episode 21, Sakura is assimilated by the Festum and is last seen in episode 22 in a coma. Near the very end, a method of reversing the effects is discovered, and it's mentioned that Sakura's starting to recover, but is not seen again in the TV series. The Bus Came Back in the movie, in which she's recovered enough to start piloting again.
Heroic Sacrifice: When a Festum pins everyone down, he picks it up and impales it along with his own Fafner on Mark Sein's sword. His cockpit is crushed from being caught in the Festum's explosion, but he's happy that he saved his friends.
Split Personality: He develops a second personality when he's piloting his Fafner. He puts on his Goubain mask, becomes hot-blooded, and kicks total ass, but once you take off his mask, he reverts back to Mamoru and forgets everything he's done as Goubain.
Wrong Genre Savvy: As Goubain, he acts just like a stereotypical Super Robot pilot and keeps using tactics that are just plain suicidal, believing that a strong heart will save the day and all that jazz. Too bad he's in an extra-bleak Real Robot anime.
Eye Scream: He has a scar over his left eye and it's implied that he's blind from it. Kazuki did it to him when they were children for some reason. Kazuki did it to save his life. He was getting assimilated.
Voiced by (Masahiro): Tomoya Kawai (Japanese), Doug Stone (English)
Voiced by (Ryoko): Shoko Tsuda (Japanese), Jessica Gee (English)
Koyo's parents by adoption.
Jerkasses: They only care about Koyo as a potential boost to their reputation, and when they think he has failed his "purpose" (i.e. falling into a coma from being semi-assimilated), they quickly want to ditch him and get another child who won't become a "loser" by their standards. What do they do when they're refused? Try to freaking kill him.
Put on a Bus: They're expelled from the island after trying to kill Koyo and aren't seen again.
Voiced by: Shizuka Ishikawa (Japanese), June Ellis (English, series), Colleen Clinkenbeard (English, Heaven and Earth)
New U.N. pilot of the Fafner Megatherion-type and Yumiko's former boyfriend. Goes back to Tatsumiya, his birth-place, and helps defend it from the Festum. Also ties things back up with Yumiko. Later pilots the Mark Ein.
New U.N. pilot of the Fafner Babylon-type. Eventually becomes an inhabitant of Tatsuymiya Island under the care of Yoko and pilots Sakura's Mark Drei near the end of the series. Is officially adopted by Yoko by the time of Heaven and Earth. Starts out still piloting the Mark Drei before becoming the first pilot of the new Mark Dreizehn.
Cannot Spit It Out: Near the end, she starts developing feelings for Kazuki, which both Sakura and Michio figure out. Because of her upbringing and lack of social skills, she has no idea how to talk to him. As of the movie, it remains unresolved.
Death Seeker: Was relieved at the concept of being killed as part of a suicide order by the New U.N. to destroy Tatsumiya Island.
Voiced by: Tamaki Nakanishi (Japanese), Mela Lee (English, series), Kristy Kang (English, Heaven and Earth)
Soushi's younger sister and the core of Tatsumiya Island.
I Don't Want to Die: Right before entering the core, Tsubaki breaks down and laments that she doesn't want to die and that she wants to live. However, she recovers and goes through with it, knowing that it will not only save everyone on the island, but also hopefully pave the way for eventual peace with the Festum.
Heroic Sacrifice: Re-enters the core of Tatsumiyajima and fully merges with the Mir in order for it to fully understand life and death.