Freyja

A little bit weird at first glance.

Appears to be out of her mind, but can act perfectly sane when she wants to or needs to.

Her codename is Cheshire, after the cat.

Probably because she appears and disappears when you least expect.

She's not exactly book smart,

But don't try to fool her, she can see right through any scam.

Reluctant to tell people where she came from, even if it isn't a secret in any way.