Some things I didn't understand in Justine

[FailedExperiment]

I'm from the Amnesia Wiki, so I'll try to answer your questions best I can.

Well I do know for sure that Justine was mentally unstable, and her father sexually assaulted her in some way, which was the reason why she killed him with the star stone.

Justine could have been transgender, or had a brother that wasn't mentioned in the game.