Draco entered the study first with Hermione just behind him.  Tom wished to listen to the group before they knew they weren’t safe from his attention.  She had left the remnants of the robe at the stone circle, but she was not yet ready to get dressed or bath.  Tonight was a night of power for a wild witch like her, and stalking around nude and covered in gore made her a powerful and intimidating figure even with her small size.