Nita is, in fact, exactly as harmless as she seems. It has a tendency to confuse people.

"Oh! I'm Nita Prentiss. Nice to meet you." She extends a hand in an offer to shake, smiling up at where his eyes should be. The armor looks somewhat similar to Wash and Grif's, but how many ways are there to design armor for a humanoid form, really?

Ooh! Maybe he's a robot! She's unclear on the etiquette of asking that sort of question, however, and decides to wait until it comes up organically in conversation.