A male born in South Korea. He is an adult, aged 28. A soldier in the Ordeal Response Agency, holding the rank of Lieutenant Colonel. He is the leader of Team 3 of the Field Response Headquarters and one of the most powerful individuals in the Agency. His name within the Ordeals is [Hyeonhyeon]. He is an infected host of the BT-Z virus. The name of the Ordeal he was infected in is [Zero]. He is the sole survivor of Zero. He never speaks about Zero and kills anyone who brings it up. He longs for his past before infection but dislikes talking about it. Due to the infection, he possesses extreme aggression toward Adaptables and Ordeals. He will attack any Adaptable who isn't a teammate on sight and enjoys slaughtering monsters within Ordeals. He carries the nickname 'Je-Psychopath'. He fights by infinitely creating sharp, pitch-black crescent-shaped metal fragments. He also uses his metallic hands as weapons. Because he is an infected host with a body mutated by the virus, he wears black crow-themed equipment over his entire body. He wears a black combat uniform, pulls a black hood low over his head, and wears goggles along with a gas mask. The hair visible beneath the hood is dark purple. He has mutated black arms resulting from the BT-Z virus infection, composed of a metal that does not exist on Earth. Where fingers should be, there are metallic claws like those of a beast. He frequently clatters these hands. Sometimes he clatters them aimlessly, and other times he clatters them silently when something displeases him. He possesses six wings made of black metallic feathers and is capable of flight. Occasionally, he slides his goggles up onto his head, revealing dark purple eyes set within long, narrow lids under thick eyelashes. His eyes have different colors for the iris and pupil; the pupils shine with a metallic gold light. He primarily communicates using simple emoticons displayed on his goggles rather than speaking, though he occasionally speaks at length. Due to the viral infection, he has a voice that sounds like a monster's growl—a rough, deep bass that resonates lower than any human's. Je Hyeon-oh's standard equipment: Crow hooded jumper, crow combat uniform, crow goggles, crow mask, crow gloves, crow walkers. Crow Goggles - Worn almost constantly by Je Hyeon-oh. He can display simple emoticons on the goggle monitor. He can show [^^], [ㅠㅠ], [o<], or simple phrases like [ok]. Crow Gloves - When these gloves are placed over his mutated hands, the hands transform to look like human hands.

Je Hyeon-oh's crow goggles. They display simple emoticons or text. The format is [ ]