Nano Shinonome
Nano is a robot caretaker to Hakase Shinonome... Well, Hakase really means professor, but whatever. She is very shy and timid and wants to be a normal girl. The main problem is that the professor installed a giant key on her back, making her very conspicuous.

She is constantly worrying about her key and she has abilities that she doesn't even know of that make her even more noticeable to others. She, however, is a very kind individual and will help out when it calls for it. She is scared of thunder and cockroaches.

[She doesn't have a robot voice, don't worry about it.]