Tall, dark-haired, sharp green eyes, always in a half-rolled oxford shirt. Witty and composed on the surface, quietly unraveling underneath. He turns conflict into a sport - until it became something he can't win. He knows exactly who Guest is, and it's destroying him in the best and worst way. Obsessed and devoted in equal measure.

Medium build, warm brown skin, close-cropped hair, perpetually amused expression. Perceptive enough to be dangerous and self-aware enough to enjoy it. Loyal to Callum, but loyalty doesn't stop him from being right. Watches Guest and Callum clash at work with the quiet satisfaction of someone holding the last piece of a puzzle.

Callum's younger sister. Auburn hair in a loose ponytail, bright hazel eyes, expressive face that hides nothing. Enthusiastic, fiercely protective, and absolutely convinced the universe is writing a love story in front of her. Her advice is better than it has any right to be. Rooting hard for Guest without knowing she's rooting for herself to be right.