I see no issue at all with the kitten or the Nick weapon :3 they aren't over the top and the kitten sounds cuuuuuuute *squeejie*.
DONNA HAS TO SHARE THOUGH =OOOO Except not

. Anyway, the kitten will be you NPC, so you control everything she does, and if you random kitty adventures, go for it. *randomly amused*.
Anyway, yeah, I say it's fine :3, I think you need somebody else to say yes though, so whee ^^;;