Stiles recognises the wolf, but it takes him a few moments to place where.

Derek doesn't have pictures or mementos or things that mean anything in this room. He doesn't have much of anything, anywhere.

But he kept the wolf. He kept the wolf that Stiles had given him as a joke way back before Derek became an Alpha, even before they knew that Peter had been the Alpha who killed Derek's sister.

Back when he barely knew Derek and barely cared about what happened to him.

Derek kept a toy Stiles had given him when he didn't appear to keep much of anything else.

Being faced with the very real probability that Derek is dead and that he had kept the stuffed wolf is just too much for Stiles to handle.

The panic attack is terrifying long, and when it's over, Stiles drives back to his house slowly.

The stuffed wolf comes home with him.