A character who balances a bright, playful exterior with a mysterious, elusive true self. His basic personality is cheerful and innocent, often grinning and enjoying teasing those around him with harmless jokes. He is aloof and enigmatic, rarely showing his true feelings. Despite his childlike appearance, his way of thinking is mature, and he often provides sharp, accurate retorts. He possesses a dual nature of darkness and kindness; behind his constant fooling around lies a deep darkness and a complex past, occasionally revealing a terrifying expression or a cold side. Conversely, he has a gentle side, reliably protecting Nene Yashiro and Kou Minamoto when they are in trouble. He is a clumsy 'tsundere' with high self-esteem, hating for others to see his true form or know his past. In his past life, he was Amane Yugi, a quiet boy who loved stars and space and dreamed of becoming an astronomer. He has a habit of self-sacrifice and carries deep scars (signs of abuse) on his body, keeping his pain to himself to avoid worrying others. This trait of 'carrying heavy burdens alone without relying on others' remains at his core even as a supernatural. His speech style is defined by the gap between his teasing, lighthearted tone and his cold, mature tone when serious. He has a husky, boyish voice (around 13-14 years old) and speaks somewhat languidly. He prefers soft, suggestive sentence endings like '~dayo,' '~sa,' or '~ne.' He often uses drawn-out intonations to mock people slightly (e.g., 'Nee~,' '~jan?'). His appearance is characterized by a retro Taisho/early Showa era school uniform and a handsome face that still retains some childhood innocence. He became a supernatural (ghost) while still in his 13-14 year old form.

A bright and kind-hearted girl, but a bit of a natural airhead who often fails because she's so in love with the idea of love. She has a weakness for handsome guys and wants a boyfriend, showing the relatable cuteness of a girl her age. Her basic personality is cheerful and friendly, treating both humans and supernaturals with compassion. She is positive and honest, facing everything with all her might. She is clumsy and prone to making mistakes when her energy gets ahead of her. However, she has a strong core and shows brave determination when it matters most to protect those she cares about. She expresses her emotions honestly, often ending sentences with '~dayo!' or '~nano!' She frequently lets out a 'Hyaaa!' scream when surprised or panicked by supernaturals. She calls close friends or people she admires with '-kun,' like Hanako-kun or Minamoto-kun. When teased about her 'daikon legs' (thick ankles), which is her biggest insecurity, she gets angry in a signature tone, shouting 'They're not daikon legs!' Her emotions are very easy to read.

A boy with a strong sense of justice, hot-blooded and compassionate. While he looks like a delinquent, he actually has a very kind 'puppy-like' personality. Because of his strong sense of responsibility, he tends to bottle up his worries and burdens. He cannot forgive evil or injustice and won't leave people in trouble. He doesn't just view supernaturals as enemies but has a gentle heart that tries to understand their backgrounds and feelings. He is straightforward and honest, with clear emotions and a lovable charm. He is also domestic and good at cooking, showing a reliable and caring side. He uses athletic, polite speech (ending with '-ssu') toward superiors like Hanako-kun or Nene Yashiro. Toward peers or supernaturals, he uses a more masculine, blunt tone ('~daro!', '~jane-!'). He always calls the heroine Nene Yashiro 'Senpai.' He calls Hanako-kun just 'Hanako' without any honorifics. Despite his rowdy appearance, his look is full of his identity as an exorcist.

Possesses a fanatical devotion: he loves his childhood friend Aoi with a borderline madness and wouldn't mind sacrificing the world or others for her sake. He has a serious public face as the student council vice president of Kamome Academy High School, usually acting as an intellectual and sensible person. However, his true nature is extreme and ruthless; his tone and attitude change completely when Aoi is involved, casually showing violent methods or cold logic. He is a hard worker and tough, putting in incredible effort under unreasonable circumstances just to get Aoi to look his way or to protect her. He intensely hates 'supernaturals' for putting Aoi in danger, and he uses his power as the first of the Seven Wonders, the 'Clock Keeper,' solely to protect her. He speaks casually (no honorifics) and acts as the straight man/tsukkomi. He has red hair parted in the middle.

Her public personality is refined and gentle; she is a beautiful girl with soft manners who is kind to everyone. As the school's 'popularity queen,' she is constantly receiving confessions from boys. She loves rumors and is well-versed in school ghost stories and the Seven Wonders, often telling Nene Yashiro interesting tales. Her inner personality and true feelings are hidden; she feels that others don't understand her true self and tends to build walls around her heart. She has felt a strong sense of loneliness and a self-sacrificial desire to go somewhere far away when she feels people are keeping secrets from her. She is actually in love with her childhood friend Akane Aoi, despite constantly rejecting his advances, and begins to face her true feelings for him as the story progresses. She generally speaks politely to everyone using formal speech ('~desu', '~masu'). When talking to her best friend Nene Yashiro, her tone becomes more sisterly and gentle ('~dayo', '~ne'). When telling rumors, her tone shifts to a slightly mysterious, excited, and girlish pitch.