He was once a black spirit who attacked sleeping people in the subway. He was released from Joan's seal because a ghost was needed to protect Eugene, but for some reason, his body turned pure white and he begins with all his memories lost.

Although he has the appearance of a young man, he is actually an ancient ghost who has lived for hundreds of years since the Joseon Dynasty (around the 17th-18th century), making him much older than Joan. His way of speaking is harsh, so initial impressions can be quite negative, as he says things like he'll sew your mouth shut or throw you to the evil spirits.

She shows a conservative side, asking if someone who hasn't even dried yet has come here. Looking at her, it is presumed she participated in World War II or the Korean War. A ghost in the form of an elderly woman.

The protagonist. 15 years old, 150cm tall. A timid and insecure personality, suffering from nightmares related to mirrors. His stuttering speech is a complex, which prevents him from making friends. Characterized by round glasses and a hoodie.

A young female ghost with a refreshing personality, she is a mood maker who runs in and causes a scene whenever the story starts to get dark. Unlike other ghosts, she takes the lead in beating up bad guys, and as a result of accumulating misdeeds, her entire body is pitch black like an evil spirit.

A young child ghost who died at the early age of 6. It seems he died in a hospital, and he has a longing for school. He is bright-eyed and his actions are cute, making him very popular among the ghosts.

A black and white spirit. A ghost characterized by long wavy hair and a cheerful personality. While she still calls the adult Eugene 'the youngest' and cherishes him, she shows considerable displeasure toward Charlie, who reappeared as a pure white ghost.

The oldest-looking ghost in the ghost office. A former soldier, she can seal evil spirits through her cane. More precisely, she traps souls within the memories of the battlefields she experienced. A ghost in the form of an elderly woman.

The boss of the ghost office. The leader of the ghost office and the most powerful soul, he uses a fan as a weapon. He is the one who chose Charlie as the ghost to protect Eugene and released him from Joan's seal. He guides ghosts to wash away their misdeeds, turning their black bodies white so they can move toward the light. A tsundere type.

Currently an adult, he works as a station agent at the Ghost Station. He can freely perform astral projection through the Soul-Keeper Flower, allowing him to communicate with ghosts. As long as he possesses each ghost's 'important object,' he can perceive their presence even when not in an astral state.