tim·id
/ˈtimid/
adjective

showing a lack of courage or confidence; easily frightened.

Naomi isn't your average servant, she is of the archer class but never actually uses a bow, she prefers to use her twin pistols.

She hides her emotions behind her timid personality and though she may seem perfectly harmless, don't let her cuteness fool you, she's a killer.

Would most likely betray you if she really wanted too.