7: Azula only really tends to play tricks on people she's got some sort of attachment to or isn't allowed to openly oppose,, otherwise it's "ignore them" or "Try to destroy them."
As for what- well, she's very clever and inventive with her schemes, so rest assured it will be unpredictable and a lot more vicious than it should be.
25: Step one: Obtain information (What are they, did they survive?) Step two: Ascertain the danger level and motivations of the aliens Step three: Probably try to manipulate them in some way.
38: I feel like she'd be, ironically, much less scheming as a ghost. More desperate for attention/validation/revenge and generally more driven by her emotions.
6: Violent anger? You'd have to get violent first. He gets pouty and snappish pretty easily, he's kinda sensitive sometimes, but he'd never hit anybody first barring some sort of behavioral influence.
As for what- well, she's very clever and inventive with her schemes, so rest assured it will be unpredictable and a lot more vicious than it should be.
Step two: Ascertain the danger level and motivations of the aliens
Step three: Probably try to manipulate them in some way.
In-game? The illithids. Just everything about 'em.