It seems Hilda is the only one who hasn't received a major power-up.. then again, I'm torn on her getting one. On one hand, she is already a demon, so she should have great power in the first place. But om the other hand, she's also supposed to be just a wet nurse, so I'm not entirely sure she qualifies for getting a power-up. Though i suppose the fact that she's always in battle does cancel that last one out...
anyways, it seems all our major fighters have power-ups: Oga and Beel with "Super Milk Time" (They just need to learn to get its side-effects under control
), Toujou's been training, that other guy that was mentioned has been training, and now Aoi has the Komainu. I think they might be able to handle Behemoth (speaking of which, we still have no idea just how insanely powerful Behemoth is)