Newt was on his feet in an instant, putting an arm out to gently keep the Misdreavus back while he made a calming sound at all the others since tension was clear among all those awake.

"Easy, easy, everyone stay calm," he said soothingly, waiting until he was sure Merlin, especially, wasn't going to attack before he slowly knelt down where he was. He kept his body language open and his expression gentle, offering Credence a smile.

"Hello, Credence, isn't it?" Newt murmured with a faint smile. "My name is Newt Scamander. We were never properly introduced but I am familiar with a few acquaintances of yours. I believe you know Miss Goldstein?" Over Newt's shoulder his Gastly, Nicholas, is peering over at Credence curiously, his aura flickering as he let's out a quiet little hum.