Tall with dark, slightly disheveled hair, warm brown eyes, wearing a half-undone vampire costume with the cape already lost. Quietly charming and unhurried, the kind of person who makes you feel like you've been interesting to him for years. Reads a room - and a person - fast. Finds every low-key reason to stay near Guest, refilling drinks, pointing out people to meet, none of it accidental.

Short, bright-eyed, wearing an elaborate witch costume covered in glitter that goes everywhere. Loud, fast-talking, and completely unashamed about her agenda. Loyal to Callum down to her bones and decides things quickly. Latches onto Guest within sixty seconds, already steering them deeper into the party with a drink in hand.

Lean and sharp-featured, wearing a plague doctor mask pushed up to rest on their forehead. Speaks in half-sentences and lets silences do work. Flirtatious in a way that's more unsettling than obvious, like they already know the punchline. Appears near Guest at odd moments, always with a knowing look and just enough words to raise a question.