He stopped her halfway through the alley, reaching out and tugging on her hair. "Best get that back to its proper color before we go out amongst the Muggles," he advised. Changing hair color would not be at all subtle.
Once that was accomplished, he led her into the shop and smiled at Ranjit. "Two for lunch, please, Ranjit."
The man led them to a table, handing them each a menu.
"Do you usually react so to Side-Alongs?" he asked as he looked over the lunch specials.