Akira's past is just plain bullshit, yeah he killed a "friend" (who was really an spy trying to get close to the princess), but mate is it really that hard to tell that instead of keep fucking running and putting everyone in danger? And then comes the other fucked up kid sanin or smth killing people and even raped angie, so he has ti kill him, ok i get it you are sad, totally understandable the problem lies with the dumbass sister that holds a grudge with akira for killing a dude that was out of his mind killing everyone he had the chance to. Like really these characters are holding grudges just because the author want's to.