Calling Your Attacks: Not as over-the-top as Gai, but still does it frequently at the beginning. "GEKIGAN FLARE!" Starts doing it less and less as the show goes on, though.
Combat Pragmatist: Despite her personality, she can come up with some pretty brilliant strategies at times, such as using fishing techniques to take advantage in one fight against a Jovian ship, and utilizing air pressure to silently maneuver her ship in space without relying on engines.
Genius Ditz: When push comes to shove, she can be a brilliant strategist.
Genki Girl: She does seem a bit over-energtic at times.
Hidden Depths / Obfuscating Stupidity: It's really interesting that during episode when part of crew had reversed their personalities, she was under affect of it and was acting like usually.
Turned Against Their Masters: Sort of - when she meets the person responsible for her education (away from an actual family) after several years, she slaps him.
Actor Allusion: In the English dub he's voiced by Brett Weaver, who also played Roy Focker and was scheduled to play Kamina before ADV lost the license.
Clingy Jealous Girl: A lot more so than Yurika, and that's saying something. It took awhile to set in, but once it did, it effectively murdered her chances of getting Akito's affection at all. She actually does gets the seeds of a serious relationship started, but she destroyed it all by trying to take things too far, which utterly repulsed him. Trying to get him to leave the crew of the Nadesico to their fate when they were in trouble didn't help either.
Heroic BSOD: A brief one in Episode 4, after the destruction of the space station.
Hidden Depths: Who would've thought a secretary would be the best qualified helmswoman for a state of the art battleship?
Jun Aoi
Voiced by: Kentarou Itou (Japanese), Mark X. Laskowski (English)
Butt Monkey: Exists for Yurika to bounce off early on, but then pretty much disappears when he's no longer needed. And is never even in the running in the Love Septagon.
Miser Advisor: ALWAYS has a calculator handy, and never fails to point out the incurred expenses that will result from whatever the crew or nadesico does/has done
Ace Pilot: When Ryoko gets in a funk during her limelight episode, Akito cheers her up saying that she's their best Aesti pilot. Might be a Downplayed Trope, though, since while Ryoko is a badass on the field of battle and she does tend to perform a bit better than her colleagues, she's typically not so far ahead of her comrades as to be set apart from them.
A Day in the Limelight: During the "beauty contest episode", which - perhaps ironically - Ryoko does not participate in.
Berserk Button: Do not try to harm Akito. It will not end well for you. She's also, notably, the first to jump to his defense when the other crewmembers are teasing/harassing him.
Refuses To Spit It Out: Unlike Yurika and Megumi, she never managed to confess to Akito...though it's more out of pride than anything.
Clingy Jealous Girl: Minor streak, but occasional subconscious referral to Akito as "My Tenkawa" and the aforementioned Berserk Button do seem to give this impression.
Fanservice: During her limelight episode, she's piloting her Aestivalis in casual underwear.
Last Name Basis: 90 percent of the time, she refers to Akito by his last name. Akito alone gets this treatment, where main characters are concerned.
Stellar Name: Subaru is the Japanese name for the Pleiades...
Tsundere: And fortunately, not abusive like so many other examples of the stereotype.
You Gotta Have Green Hair: However, it turns out it's dyed, evidenced both in the above mentioned flashback in the show and through the entirety of the movie, which shows she's entirely given up on dyeing it.
Her natural hair color is purple, so the trope still applies.
Love Hurts (due to unresolved issues with her ex-boyfriend she is one of the few not chasing after Akito, and also has to let Uribatake down gently when he tries to start a relationship with her)
Cold Sniper: She seems to be more proficient with ranged weapon. This is especially underlined in Super Robot Wars, where she has penalties for close combat, and bonuses for range.
Dreadful Musician: how she was able to make a living out of it after the series is a mystery
Berserk Button: He has two of these: 1) Seeing Akito 'get all the chicks', and 2) people breaking his Aestivalises.
Cargo Ship: He went head over heels with glee at the sight of the Aestivalis piloted by Nagare Akatsuki.
Dirty Old Man: Played straight and subverted and played straight again. Part of the reason he came aboard was to get away from his wife and (theoretically) spread some wild oats. Later on, people think there's something going on between him and Hikaru. Then they find out that she's helping him build a diorama with 1/48 scale plastic Aestivalis models. Then Hikaru has to let him down easy when he does try to start a romantic relationship with her.
And then subverted again later in the series when he makes a heartfelt promise to his wife that he'll return to her once the fighting ends.
Where Does He Get All Those Wonderful Toys?: Justified; he makes most of the special gear used by the Nadesico by embezzling Nergal company funds, but they turn a blind eye to it as it means they get new equipment to use.
Chekhov's Gunman: Remember that adorable little girl that Akito give an orange to in the first episode? well Inez is who she grew up to be. After one too many Time Travels. It's... complicated, okay?
Ms. Exposition: She even has a sixth sense for when something is about to be explained.
Howmei
Voiced by: Miyuki Ichijou (Japanese), Marcy Rae (English)
Crazy-Prepared: She has over 300 different spices in the ships pantry. Her reason: she wants to make sure each crew member gets to eat exactly what they want, because nobody knows if it might be their last meal.
Mentor: To Akito, at least where cooking is concerned.
Heroic BSOD- He was actually a much more moral, upright human being who believed in justice and doing the right thing, but he became corrupted by his own ambition, and after The Reveal on the identity of the Jovian Lizards, he snaps when his guilt over the bastard he became and his horror that what he fought for was a massive lie combine and drive him crazy.
We Have Reserves: When Minato points out that shooting the Nadesico's gravity blast will cause massive friendly casualties, his answer is pretty much "So what?"
Nagare Akatsuki
Voiced by: Ryotaro Okiayu (Japanese), Jay Hickman (English)
Grey and Grey Morality: That's pretty much his view of the world - there are no good and evil, everyone should fight for himself only.
Jerk with a Heart of Gold (Believe it or not, he did make an honest stab at playing Big Brother Mentor to Akito [and it actually worked to some extent], and he does to some extent join in on the craziness of the Nadescio crew willingly.)
Super Robot Wars Judgment and Super Robot Wars W makes this even more obvious, albeit they do acknowledge his Jerkass tendencies and give him NO relationship bonuses to anyone (not even friend bonuses)
Smug Snake: Never quite reaches her boss Akatsuki's levels of brilliance, and comes across more as an annoying, self-important bitch who cares for nothing but herself.
Identical Stranger: Somewhat justified in that he and the character he resembles are effectively styling themselves after the main character of Gekiganger III.