I bet the sister is also an yokai, no way that a girl born from a mafia family with yokai members is just going to be a normal girl, specially on this kind of Manga.
Calm down dude, yes this is probably mtl, but you should be happy it's getting a translation at all, and sincerely this first chap wasn't bad, but not the best shit ever.
Well those guys that are invading the boat should be good guys, didn't the God slapper go with them to do something? I wonder if they have a plan, or something at all to fight against Griffith