Sonja catches a glimpse of Isobel out of the corner of her eye, and doesn't quite double-take, but...that's interesting. She knows Ilde's general aura of faery being well enough to know it's not the same person, and there are subtle differences, but she finds it curious enough to say something.

"You look familiar." In some people, this would be a vaguely open-ended statement. The dry way that Sonja says it makes it more pointed. Her body language is relaxed, but she is definitely armed--just comfortably so. "Enjoying the festivities?"