For sure there is something. Im shredded to pieces, like every good Spandam would do, the pictures of Luffy, BB and Shiraoshi (just pierced) and had a picture of Vivi too which was later actually kidnapped. Maybe he left Shiraoshi alone because she could have called for the sea kings and then Marijoa or not the place would have become a mass of pongo. So most likely Vivi has something to di, maybe even with ancieng weapins, but she is not dangerous on her own.