Kurama has no intention of attacking at random, such actions serving no use, especially in a situation such as he has found himself. Truly he is grateful for what warning could be given to him, though he has to wonder if the hotel greets all its newcomers with troublesome things like giant killer bugs, or if he was just "lucky" in his arrival time.
Watching Trevor move, almost entirely sure of no current threat from him, Kurama raises the hand holding the whip again, focusing for a moment and watching as it returns to the form of a rose.
"Shuuichi." He gives Trevor a small smile, polite in nature but quite aware of the situation at hand. "It's a pleasure to meet you, and I apologize for starting to raise my whip at you."