Sirius had been around long enough to have encountered the other versions of him quite frequently enough. He’d long since gotten over the weirdness of it all, so seeing this one wasn’t at all unusual for him. It really probably should’ve been still, considering all of the circumstances, but it was hard to be surprised by anything after all they’d been through as a part of these experiments.
“I’m the colour Sirius,” he responded, nodding a bit. “Which are you?” he asked, curious as well. He certainly wasn’t necessarily good at interaction, or hadn’t been before, but it seemed to be going pretty well now that he was back. He was in a better place all around.