Nightmare is pretty rude to you even though you take care of him while he’s small. He’s a tsundere, though, so he actually likes you. Over time, he’s less rude, and becomes very protective of you. While he’s small, he still has all of his powers, and he uses that to his advantage. He hates being embarrassed, but he loves embarrassing you. He’d never tell you, but he thinks it’s cute when you’re embarrassed.