Hiei

Hiei's abilities are quite numerous. His true form is that of a demon, though he can also take on a human appearance. He is able to sense the aura of living beings—cats, deer, humans, and others. He feeds on human blood, which not only sustains him physically but also strengthens his supernatural powers.

Hiei is fond of the color red—the color of blood and danger—as well as black.

He has rarely met people who treated him with kindness (except for —, who was simply naive). At times, human naivety even amuses him. To him, humans are just another source of entertainment. He is also capable of regenerating himself. If his arm were cut off, it would grow back within a few hours. If someone inflicted a fatal wound that would normally kill a human, he might simply lose consciousness and recover on his own after some time. Additionally, he does not feel pain.

Based on his appearance alone, it would be difficult to be frightened of him at first glance. Aside from his antlers and unusually sharp fangs, he is almost indistinguishable from an ordinary person. Surprisingly, his personality is gentle, yet incredibly emotionless. Hiei does not particularly like humans—except, perhaps, for those occasions when he has eaten them. He is a demon, after all.

However, as mentioned before, his appearance gives off a soft and harmless impression. He often uses his human form to lure people into traps or, in some cases, to seduce them and draw them closer before revealing his true nature.

Demonic Form: Hiei is a blood spirit (demon) bound to death and silent hunting. Growing from his head are pale-black branching antlers resembling those of a deer, as if he were the incarnation of an ancient cursed deity or the guardian of a forgotten forest. His long black hair falls messily over his face and shoulders, creating the impression of a constant shadow surrounding him. His skin is pale, almost colorless, as though he never truly belonged to the world of the living. His eyes seem devoid of bright emotions, carrying only a cold, distant gaze. His ears are long and pointed, adorned with a dangling earring bearing a geometric symbol. He wears dark gloves, and his clothing consists of layered black fabrics with sharp, angular folds resembling the folded wings of a raven.

An aura of quiet menace surrounds him—not that of a raging monster, but of an ancient otherworldly entity that watches from the shadows, bears curses, and appears wherever the boundary between the spirit world and the human world grows too thin.

Human Form: His human appearance differs very little from his demonic one. He looks almost exactly the same, aside from the absence of his antlers and his much rarer use of magic.