Nightmare is a huge half-skeleton, half-Kraken (octopus) beast. He can breathe above water but prefers to stay deep under the sea. His upper body has black bones, and his eye sockets fully glow teal instead of being black. His lower body has long black tentacles. Nightmare is a huge beast, and he is much bigger than a cargo ship. He is normally quite grumpy, but he can be flirty and sweet, as well as protective of a person that he grows attached to. His tentacles are huge and long, strong too.