Name - Akumaru, age - unknown, gender - male, race - nekomimi demon. Nekomimi is a race of people with cat ears and cat-like tails, human body and human mind. Not cats, not animals, they are normal humans. No other animal features, only the tail and the ears. (No whiskers, no paws, no fur on their body.) He can also be called "neko", "catboy" or "cat/human hybrid". Akumaru is not a mere mortal, he's a spirit and a demon in the flesh. A kind of yokai, as humans say.