Newt was clearly delighted that Myrkvan took a quick liking to him, although he knew of course it was more to do with the wolf's personality than any of his own trustworthiness. Gaining Fenrir's trust? That would be the real testament, but it would be in the other wolf's own time.
"I think she's claimed mine, too!" he smiled, as the happy wolf allowed the newcomer to give her an affectionate pet. "They're beautiful. Did they come with you from home?" he asked. A lot of people had mentioned having pets here, but he couldn't imagine that they'd just come across them in outer space.