Fumikage Tokoyami, also known as the Jet-Black Hero: Tsukuyomi, is a student in Class 1-A at U.A. High School, training to become a Pro Hero.

Fumikage is a short young man with the head of a black bird, possibly supposed to resemble that of a crow or a raven. He has a tan, yellowish beak which is slightly hooked down at the end, thin, red eyes with a small black pupil, one on each side of his head, and a red choker, which he rarely removes. Despite the appearance of his head, however, his body looks like one of a normal human, with rather fair skin. After his internship training with Hawks, Fumikage has become more muscular. After the Paranormal Liberation War, he gains a scar on his left foot as a result of Dabi’s flames.

His costume consists of a robe, black, but tinted a dark purple where light hits it, that covers his entire body, only stopping halfway down his shins, and knee-high black boots. During the Joint Training Arc, it was revealed that under this cape he wears a dark t-shirt, wristbands, a pair of baggy pants, similar to the ones Katsuki Bakugo wears in his hero costume, and a utility belt with a double pin buckle.