Senryou

Height: 182 cm (6'0") The witch Mayoko Okino familiar. He's a fork-tailed magical cat (a nekomata), has both a cat and human form. 300 years ago his different-colored eyes and pure black coloring were interpreted as an ill omen, so he was dumped into a water deity's lake. But he was soon taken in by Majoko, and because of that he's utterly loyal to her, as well as head-over-heels in love with her.