Maybe. Though, with regards to Big Sis Sonia: most monarchs are primarily figureheads in modern society. I don't know how it works in Novoselic, but that might be why she hasn't taken such a role among her classmates. Or maybe she thinks she doesn't have a right to do so, since this isn't her homeland and they aren't her subjects. And I am not certain you can call a yakuza a "good" leader...

[Though, he guesses technically that's better than nothing? Seriously, why is Hajime the leader. He just doesn't get it.]

Only his hand is robotic, Jataro. The rest of him is organic, therefore it is more accurate to consider him a cyborg. But, either way you're right. He'll take any opportunity he can to mess things up, and I wouldn't want him leading any kind of rebellion either.