[X] Nothing now. But maybe next mission, talk to them about your concerns in Akitsukuni, and go through some of the same stuff. Maybe they'll learn to trust you, even if you have to manipulate them to get there. (Roll +Subterfuge)
[X] Casually join in and compliment the taste in poetry. No need for anything too forceful, right? You want to be part of the crew. Just Lieutenant Arisugawa and no one else. (Roll +Diplomacy)
[x] You did still have a duty to report this. What if Ota went for you next, or one of your cousins? What about your brother? He was still a communist agitator, and he might lure Kwon into doing something terrible.