Madeline is a short, young Canadian woman with pale skin, purple-ish eyes, and long thick ruby hair with one wayward curl. Throughout the events of the game, she wears an aqua snow jacket, dark grey pants, black and dark grey walking boots, and her brown climbing backpack equipped with a red sleeping mat and plastic water bottle.

Badeline looks just like Madeline, but has long purple hair, pale skin, and red eyes. She wears a purple jacket with black pants and boots. In Theo's eyes, she's a "goth version of Madeline". In game, she generally appears levitating in the air surrounded by a purple aura. In her official art she has no aura, but is still depicted levitating in the air.