"Hullo," Ianto greets him, more casually than he would most customers. He does remember Sebastian, and is vaguely aware of him as another member of Hellsing, little though they interact on the job. "Your dog?" He nods his head at Velcro, unconcerned about having a dog in the shop, but rather impressed by Velcro's apparent level of intelligence. Then again, Ianto wouldn't be the least surprised if he only looked like a dog.