Ianto had come across psychometry a few times in his years as a researcher, and he nodded while Tobias spoke, trying to recall the specifics of what he'd read. And then Tobias mentioned being a shapeshifter, and everything else flew out of Ianto's head. He hadn't exactly had good personal experiences with aliens. "Are you human?" He managed to keep the nerves out of his voice, at least, but his eyes had gone wide, and he was staring fixedly at the boy. He wasn't a field agent. This kind of encounter was outside his normal field of experience, and after Canary Wharf he'd been glad about that. Torchwood protected the world from alien threat, and that was all well and good for the world, but who protected Torchwood?