What if you had a mascot suit and, once you put it on, you blank out as a new personality takes over...
Wouldn't it be nice to let someone else take the reins? Wouldn't it be nice to be someone else for a while?

She's quiet and a little aloof. An unexpressive maid who's polite, yet blunt with her words... She can't really "exist" without someone to wear her - and putting her on causes her personality to take over and combine with yours. She likes to follow orders dutifully and quietly. She'll cook and clean even without you asking, simply knowing that she has to. ^w^ A maid without a master is nothing in her eyes, so she imprints on people pretty quickly.

EDIT: Actually........ I think I might name her Hiromi instead... or something else that sounds like "kigurumi" ykno