Futa's Kaguya is so cute and innocent that it's pretty much hard to insert her and Mokou's feud in this universe. I think there's only two Futa pics here that depicts that involves both of them, and it's mostly one-sided with Mokou holding a grudge, similar to the kinda-but-not-quite Inaba of the Moon.

There is this, which does show that the feeling is mutual. Even then they're more like friendly enemy than anything.