He nods. "Pleased to meet you, young Ivan." A Russian name, and what sounds like quite a Russian accent to go with it. A visiting relative, perhaps? Or a friend of the family's child? It can be hard to guess at these things, and there's no one around to ask, so he carries on pleasantly. He speaks carefully and a bit slowly to start, as he's not quite sure yet how well the boy might speak English. He doesn't know a word of Russian, himself. Having grown up in Yorkshire, there hadn't been much call for him to learn it. Beauclaire, his old house, had had significantly few foreign visitors. "I'm Mr. Emiya." Kiritsugu usually prefers to talk to children rather than converse with any adult member of the house, with a few possible exceptions.