Apple

History
Once an ordinary human with an ordinary human name, the girl now known as Apple met Nightmare under unusual circumstances after her parents' death. The exact situation is mostly unknown, but the two children quickly became friends.

After some time, the tragedy continued, and Apple's own life was taken - if not for Nightmare giving her the smallest fraction of his essence, saving her life, turning her into one of his spawns, albeit a low level one so that the power would not overtake her humanity.

Years down the road, the child monster was finally caught and forced to attend Crossroad's High.

Abilities
Even though she's had her powers for years, she's only just managed to master the basics of her new form. She has a high level of damage tolerance and regeneration - to human eyes, it's absurd, but this is only because she doesn't have any weakpoints like humans do. Although she has mock organs, they're effectively meaningless - her life is sustained by her creator's power, which flows through her blood even if he were somehow unable to reach her.

She can also summon Nightmare and communicate with him, although the world eater is not fond of universes as small as the one Crossroad's High is located in, its defenses repelling him somewhat like an anti-insect lantern would repel insects.