Her pose is so cute! As always, your anatomy is wonderful. Her posture and pose and hands all look really great. In fact, she makes a super cute pinup, but I don't know if she's really a vampirella pinup. Her expression is too soft and friendly and innocent, it looks like a girl cosplaying as vampirella. Maybe make her look a little angier or more lustful, or just straight-up meaner, to get more of the character's personality into the piece.