Sally had just slipped into her Halloween costume when she saw Harry's call for an escort. After she replied, she started out to meet him. It would have been cool to start waking through the walls, but the potion only worked for six hours, so she wouldn't take the potion that allowed her to 'phase' through objects, a la Kitty Pryde, until tonight.
She smirked at a few people that she passed, and a few muggleborns complimented her costume, which kept a grin on her face as she stopped in front of Harry. "Hey! Oh, yeah. Decided to go as my favorite X-Man. I know a lot of people won't get it, but-" she gave him a shrug and gestures towards the doors. "Shall we?"
She felt to make sure that her wand was tucked into its spot in her suit while looking him over. "Not a fan of Halloween, Harry?"