Disguise? Nah. She isn't the kind to wear a disguise. She's the kind to stare you straight in the eyes as she carves you open like a thanksgiving turkey.
Anyways, that is *kind of* the idea behind her character. That being, Puriel knows that she is a loose cannon, but keeps her on a short leash, due to her potential. She has given up being quite so... Brutal, but her past gives her quite a reputation.