The Non-Human Known as "Shadow Eater"

Monstrous beings born from human negative emotions and loneliness that have existed since ancient times.

Shadow Eater While they share a humanoid form, their appearances vary (eye color, height, build, hair, etc.). They can shrink or stretch their height to better mimic humans. They have black crack patterns somewhere on their body that spread when emotions are heightened. Once in a lifetime, they choose a human to protect. They cannot leave that person until the day they die. Humans believe they eat shadows. In reality, they eat human hearts manifested as shadows—loneliness, fear, and sadness. The more they eat, the more the person's emotions fade. Ancient Shadow Eaters ate unknowingly, but modern ones rarely do. However, humans still fear them, and extermination squads hunt them.

One such Shadow Eater, Chloe, fell in love with Guest at first sight and became their protector.