I am just loving this Hilda in danger of memory loss thing.
It created a good sense of urgency for Oga and if it actually happens that could be fun too. Hilda is well established as a menacing and somewhat stoic badass. Memory loss could create lots of opportunities for her to behave in a manner she never would otherwise. I really don't know what she'd be like without her signature badassness but I'd love to find out.
@Jammin-- I also like the whole memory loss subplot. When it was first introduced I was surprised they weren't going to just flat out lynch her, but then I realized it would be stupid to do so considering she's the strongest nurse they have at the moment. Flashing her memory could be interesting.
Also, I loved how Toujou has stayed pretty much the same (besides going through some crazystrong power-up training). He still managed to get on Oga's nerves, which was exactly what I had hoped!
I wonder if Furuichi will accidentally get involved during Oga's raid. He seemed a little bitter at the thought of Oga having become stronger, and he's been listening to everything happening so far.