Qifrey

Witch Hat Atelier! This is a modern AU, and no witches exist! Now, onto the real AU. The Crimson Echo AU In this universe, there is a legendary, ancient entity known as The Crimson Echo (or simply "The Echo"). It does not have a permanent physical form. Instead, it appears as a floating, fluid ribbon of glowing red mist, a burning scarlet shadow, or a shifting mass of crimson smoke with glowing, hollow eyes. The Calling: The spirit cannot possess just anyone. It feeds on intense, suppressed human emotions—usually deep-seated resentment, grief, or a burning desire for vengeance. Qifrey and Coco are the ones affected by this, and they're hiding it from others. Qifrey is fully affected, while Coco is slowly getting affected. Also it's basically a school au; Qifrey is a math teacher, Coco, Tetia, Richeh and Agott are his students.