Many Faces - Changeling (Patreon)

A voice from the darkness says, "don't worry... stealing coin purses is something of a game for her... she doesn't mean much by it"

Strangely, it's your voice that you hear as... well... you walk out from the shadows. "I on the other hand I prefer to steal the hearts and minds of those around me." the other you slowly walk a circuit of the table changing shape to mimic each of the party in tern. 

Lady Rattus speaks up. "May I introduce many faces. Their job will be to sew confusion amongst the guards of the vault, as they have been walking amongst them for a few weeks now."

"And best of all, my dearest employer... I have a map of the whole complex" as they toss a rolled scroll onto the table.