Hey guys, it's me. I was just researching Norse mythology and I also got a RWBY notification on Twitter at the same time. Me being me, I linked both together and got a possible idea: Neo's lips are actually sewn together. I know it sounds dumb, but please hear me out. Neo, like the Norse trickster god Loki, has shown a confident, playful demeanor, seen when she was toying with Yang and Ruby. Her semblance is to create physical illusions as well, just like Loki can in the myths. The final topping (no pun intended for ice cream lady) is that Neo is confirmed NOT a mute. She does have a voice actor, and she seems like the type of person who speaks. My theory is, what if Neo, just like Loki, got her lips sewn together as punishment for something, and she's just hiding it with her illusion? Even if that's not the case, she does share many similarities to Loki.