[The effect of that whistle is immediate. A chill moves into the room with lowered temperature, cool on his skin, eyes darting to the slight gap beneath the door where a dark shape slips inside. He doesn't experience fear, exactly — and perhaps a large part of that is how cavalier this man, Wei Wuxian, is in response to it. It should be strange to trust someone he's only just met, but he suspects if he was meant any harm it would have happened by now. And... part of his desire to begin his journey was exactly this — an opportunity to experience a world he does not control.

So there's still some tension in him, that malevolence unlike anything he's felt in the shadow of either the Harmony or the Order, but it eases as soon as black-smoke hands reach to pour them tea.

Such a miraculous sight. A ghostly phantom bent to this man's will as one might coax a puppet. Naturally, his mind wonders how this could be abused, and if so... how would a deceased spirit experience that wrong?]

Oh. [It takes him a minute to stop staring in awe once addressed, lashes flickering. First, to the spirit, mirroring Wei Wuxian —] Thank you. [And he gathers the cup of tea into his own hands, feeling its pleasant warmth.]

Does that mean it could be dangerous if it becomes corporeal? Is it... more of a person, aware of its past life?