Action Survivor: She straddles the line on this trope. She's very much a reluctant everyman in unusual circumstances, but the Nanofield she's granted means she fails on the "Normal" part of "Badass Normal".
Artistic Age: She's supposed to be 20, but looks more like a teenager in the cutscenes.
Bad Ass: In the backstory, a single 'Annihilator' mini-boss went berserk on a Tasen warship and killed nearly everyone, Tasen and Komato alike. Iji, however, can simply ignore them, or at the top of her combat prowess destroy them in a matter of seconds.
Badass Pacifist: Even when on a pacifist run, her enemies notice how she's running through hostile battlefield like there's nothing in the way.
The Berserker: Iji can easily become this if she kills enough enemies.
Beware the Nice Ones: Despite starting out reluctant to kill clearly hostile aliens, she can end up with a body count in the hundreds.
Big Sister Instinct: She ends up protective of Dan. Due to endangering Dan, Asha is the only person Iji never shows even a shred of regret for killing, and this reaction is completely unchanged by her kill count.
Hypocrite: On a killer path. She argues the alien leaders are immoral for killing everyone, while she's been doing just that. She even admits it during the pre-battle fight with Iosa, who mocks her for being a hypocrite.
Small Girl, Big Gun: For humans, Iji's quite tall at 6'3" (190 cm — she's taller than most men!). However, since her gun was designed for Tasen, who are 7 feet tall at the shortest (and the Elites who would get to use her gun are closer to 9'), the gun is ridiculously oversized for her.
Technical Pacifist: There are plenty of ways to kill enemies without getting them on your counter, including arranging friendly fire accidents (e.g. blocking missiles with your face while standing next to an enemy, so that you'll survive the explosion but he won't), letting another enemy do the dirty work, setting a mine, and (in 1.6) reflecting their shots back at them. Also, machine enemies don't count, nor do Assassins (who aren't killed, but driven away).
Theme Naming: All the Kataisers have three-letter first names.
Well-Intentioned Extremist: On a killer run, she intends to drive the invading aliens back off the Earth before they can destroy what little is left... by blowing everyone in her way straight to hell.
Teen Genius: Regardless of how he might appear otherwise, it was Dan who managed to crack Tasen electronics. In fact, the surviving scientists got their act together only after his example shamed them into action.
Skippable Boss: As long as you stay Innocent (No kills) or Pacifist (Very few kills) in the first three sectors, you can bypass the battle with him through a truce made with his men. If you don't skip him, even if you don't technically kill him (by clever use of the turrets), Iji's guilt will count Krotera as one of her kills.
Last Of Their Kind: Along with Vateilika, the diary writer and her girlfriend are the only Tasen to survive the game if you kept the truce, except in Version 1.6, where keeping the truce on a pacifist run lets more Tasen survive.
Law of Chromatic Superiority: Like Krotera, he's based on an ordinary enemy found later in the game, but differs slightly. In this case, he wears purple instead of black, and apparently isn't wearing a shirt.
Villainous Breakdown: Activate a single checkpoint before going into the second fight with Asha. Die to him. Activate a second checkpoint. Die to him again. Then challenge him one last time. His reaction is PRICELESS.
For those of you who don't want to go through sector X in a very specific and difficult way just to get this reaction, he says that he is going to "rip you apart and throw the pieces into a black hole. TEN TIMES".
He also suffers a breakdown and kills himself if you refuse to fight him the second time
Villains Never Lie: Averted, Dan's not a traitor. It's just a trap. Iji sees through this anyway.
Nigh Invulnerable: to be more specific, it's a combination of a powerful Nanofield and a natural resistance to energy beams, which is the reason she can have a personal Nanofield without being fried.
Not So Different: Both Iji and Iosa lost their homeworlds to Tasen Alpha Strikes. Iji attempts to call her out on it at the beginning of their fight. Depending on how the player has been playing Iji, Iosa can throw that right back in her face.
Odd Name Out: She's the only alien in the game with a last name, at least one ever mentioned.
Martial Pacifist: Believes that fighting and killing should be done sparingly. Also believes that violence should be done with absolute force when it is necessary. Nonetheless, she respects you the most if it turns out that you do not need to kill to accomplish your objectives.
Dangerously Genre Savvy: He sort of invokes this during the Final Boss fight if he powers up the Phantom Hammer enough to fire it. Seeing him charge up his ultimate weapon will probably prompt the player to try to dodge it by ducking. Tor sees this coming and stomps the ground to knock the player into the air and then fire it.
Tor:Grraagh! Impossible... it, it's impossible!!! How could a mere human... so weak and insignificant... against a fully powered General? So much fighting skill and combat spirit... in such a frail body... Have mercy... please, I beg of you to have mercy on me!