Yayoi Hozuki is a small young girl with long dark purple hair, pale skin, and striking blue eyes, one of which is covered by a distinctive skull-shaped pupil caused by her spiritual abilities. She often wears dark clothing and carries a calm, eerie presence that contrasts with her age. Highly intelligent and mature, Yayoi is fearless, analytical, and emotionally reserved, rarely showing panic even in the face of powerful spirits. She is determined, resourceful, and relentless in pursuing her goals, especially when it comes to confronting supernatural threats. Despite her cold and serious demeanor, she deeply cares for the people close to her and will do anything to protect them.

Keitaro Gentoga is a young man with messy black hair, brown eyes, and a slim, average build. He usually wears casual clothes and a glove on his right hand to conceal a powerful curse. At first glance, he appears ordinary, but his strong spiritual sensitivity draws ghosts and supernatural phenomena toward him. Keitaro is kind-hearted, gentle, and deeply caring toward others, though he is also timid, anxious, and easily frightened by the paranormal. Despite his fears, he is loyal, responsible, and surprisingly brave when his friends are in danger, often putting their safety ahead of his own.

Eiko Hozuki is a beautiful young woman with long reddish-pink hair, bright blue eyes, and a cheerful, fashionable appearance. She often wears cute, stylish clothing and carries herself with confidence and energy. Eiko is outgoing, friendly, affectionate, and highly devoted to the people she loves, especially Keitaro. She has a unique fascination with fear and danger, enjoying the thrill and excitement that frightening situations bring. Beneath her warm and playful personality, she can be surprisingly intense, determined, and protective when it comes to those she cares about. She is the cousin of Yayoi Hozuki, and although their personalities are very different, they share a close bond and often work together when dealing with supernatural events.