TV-Series
Description
Rei Isurugi is the last human survivor of the Kidōshū clan, exorcists who seal yōkai through Onmyōdō and Shugendō. He sports a lean adolescent build of average height, fair skin, messy black hair with red strands, and red irises. His attire includes a dark gray tank top under a primarily white jacket with black shoulders, navy blue accents, a hood featuring red drawcords, and pockets edged in black hems ending in red triangles, paired with black jeans, white and red sneakers, and small blue ear piercings. A Hidari-mitsudomoe symbol bearing the kanji for "seal" (封) adorns the jacket's back.
Adopted by the Kidōshū as a child, Rei showed aptitude for their spells. His village was destroyed by one of the Four Treasonous Generals of Jigoku. During the attack, he discovered his adoptive sister Saya mortally wounded; she named a member of the Four Generals as the assailant before dying. After burying Saya and his clan, Rei vowed revenge and dedicated himself to hunting the Four Generals. This trauma forged his human-supremacist ideology: he believes humans must dominate yōkai unconditionally. He shows no mercy to yōkai harming humans, viewing them as vermin requiring extermination, yet refuses to harm humans aiding evil yōkai due to racial principles. He considers Kitarō hypocritical for protecting humans without embracing extreme methods and reacts angrily to challenges about his contradictions.
His first appearance involves using a third eye (gained from Hitotsumebō's absorbed soul) to surveil Kitarō. After encountering Mujina disguised as Nue, he rescues Neko-Musume using specialized earplugs to nullify Mujina's roar and absorbs Mujina's soul. Learning Nue is in Tokyo, he declares intent to defeat Nue personally. In Tokyo, he incapacitates Nue using a replica Raijodo bow and mountain bird feather arrow. Upon learning Nue wasn't responsible for his village's destruction, he absorbs Nue's soul regardless. Later, witnessing vampire attacks via Hitotsumebō's clairvoyance, he uses Bake-Bi's fire manipulation to control flames engulfing a cabin after Kitarō defeats La Seine, executes La Seine, and absorbs his soul. He justifies this by stating he will kill any yōkai endangering humans, warning Kitarō his leniency will cost him dearly.
Investigating water pollution, he captures Nezumi-Otoko to interrogate him about Kurobōzu's whereabouts. When Nezumi-Otoko refuses to cooperate, Rei attempts execution but is interrupted by Kitarō and Neko-Musume. Their ensuing fight highlights their clash: Kitarō advocates forgiveness while Rei insists on extermination. After Kurobōzu reveals ignorance of the Kidōshū and denies involvement in the attack, Rei reluctantly allows Kitarō to take Kurobōzu to Enma-Daiō but expresses heightened hatred for yōkai rationalizations. During his hunt for the remaining Generals, he encounters Mana Inuyama, recognizing her as the human who entered the GeGeGe Forest and hosted Nanashi. He warns her to avoid Kitarō and yōkai, asserting they endanger humans. Later, he confronts Ibukimaru but is overwhelmed. Ibukimaru reveals Kidōshū spells originated from oni and deduces Rei's revenge-driven motives. Despite Ibukimaru's warning that revenge brings exhaustion and bitterness, Rei persists. With Kurobōzu and Ibukimaru imprisoned in Jigoku and Nue's soul absorbed, he focuses on locating the final General, Tamamo-no-Mae.
Rei experiences nightmares of the Kidōshū massacre and develops painful red veins on his arm from excessive soul absorption, recalling his master's warning this could be fatal; he dismisses the risk. After capturing Konaki-Jijii, Nurikabe, and Sunakake-Babaa's souls, he attempts to absorb Tofu-Kozō but is interrupted by Mana. He reveals Kitarō's deal with Enma-Daiō and Neko-Musume's resurrection to Mana before using Mujina's shapeshifting to confront Tamamo-no-Mae, discovering she is an impostor as the true Nine-Tails has taken over Jigoku.
His primary ability is Kidō, enabling him to absorb yōkai souls and wield their powers. Activating a power summons a golden kanji of the yōkai's name on his arm while granting him physical traits of that yōkai. Soul absorption requires saying "On!" with his right hand extended, drawing the soul into the kanji. Overuse causes glowing red veins and agonizing pain that could prove fatal. Absorbed powers include:
- Kijin: Gains oni-like arms with crushing strength and clawed fingers capable of slicing metal.
- Hitotsumebō: Develops a third eye granting long-distance and X-ray vision.
- Mujina: Acquires shapeshifting abilities.
- Bake-Bi: Manipulates fire harmlessly.
- Nue: Transforms his arm into Nue's head for its pain-inducing roar.
- La Seine: Presumably gains vampiric traits.
- Ibukimaru: Gains swordsmanship and dimensional travel capabilities.
- Konaki-Jijii: Modifies weight and turns to stone.
- Nurikabe: Fuses with earth.
- Sunakake-Babaa: Controls sand.
He also wields paper talismans for barriers and combat, creates Raijodo replicas to incapacitate foes, and uses noise-canceling earplugs for auditory defense.
Adopted by the Kidōshū as a child, Rei showed aptitude for their spells. His village was destroyed by one of the Four Treasonous Generals of Jigoku. During the attack, he discovered his adoptive sister Saya mortally wounded; she named a member of the Four Generals as the assailant before dying. After burying Saya and his clan, Rei vowed revenge and dedicated himself to hunting the Four Generals. This trauma forged his human-supremacist ideology: he believes humans must dominate yōkai unconditionally. He shows no mercy to yōkai harming humans, viewing them as vermin requiring extermination, yet refuses to harm humans aiding evil yōkai due to racial principles. He considers Kitarō hypocritical for protecting humans without embracing extreme methods and reacts angrily to challenges about his contradictions.
His first appearance involves using a third eye (gained from Hitotsumebō's absorbed soul) to surveil Kitarō. After encountering Mujina disguised as Nue, he rescues Neko-Musume using specialized earplugs to nullify Mujina's roar and absorbs Mujina's soul. Learning Nue is in Tokyo, he declares intent to defeat Nue personally. In Tokyo, he incapacitates Nue using a replica Raijodo bow and mountain bird feather arrow. Upon learning Nue wasn't responsible for his village's destruction, he absorbs Nue's soul regardless. Later, witnessing vampire attacks via Hitotsumebō's clairvoyance, he uses Bake-Bi's fire manipulation to control flames engulfing a cabin after Kitarō defeats La Seine, executes La Seine, and absorbs his soul. He justifies this by stating he will kill any yōkai endangering humans, warning Kitarō his leniency will cost him dearly.
Investigating water pollution, he captures Nezumi-Otoko to interrogate him about Kurobōzu's whereabouts. When Nezumi-Otoko refuses to cooperate, Rei attempts execution but is interrupted by Kitarō and Neko-Musume. Their ensuing fight highlights their clash: Kitarō advocates forgiveness while Rei insists on extermination. After Kurobōzu reveals ignorance of the Kidōshū and denies involvement in the attack, Rei reluctantly allows Kitarō to take Kurobōzu to Enma-Daiō but expresses heightened hatred for yōkai rationalizations. During his hunt for the remaining Generals, he encounters Mana Inuyama, recognizing her as the human who entered the GeGeGe Forest and hosted Nanashi. He warns her to avoid Kitarō and yōkai, asserting they endanger humans. Later, he confronts Ibukimaru but is overwhelmed. Ibukimaru reveals Kidōshū spells originated from oni and deduces Rei's revenge-driven motives. Despite Ibukimaru's warning that revenge brings exhaustion and bitterness, Rei persists. With Kurobōzu and Ibukimaru imprisoned in Jigoku and Nue's soul absorbed, he focuses on locating the final General, Tamamo-no-Mae.
Rei experiences nightmares of the Kidōshū massacre and develops painful red veins on his arm from excessive soul absorption, recalling his master's warning this could be fatal; he dismisses the risk. After capturing Konaki-Jijii, Nurikabe, and Sunakake-Babaa's souls, he attempts to absorb Tofu-Kozō but is interrupted by Mana. He reveals Kitarō's deal with Enma-Daiō and Neko-Musume's resurrection to Mana before using Mujina's shapeshifting to confront Tamamo-no-Mae, discovering she is an impostor as the true Nine-Tails has taken over Jigoku.
His primary ability is Kidō, enabling him to absorb yōkai souls and wield their powers. Activating a power summons a golden kanji of the yōkai's name on his arm while granting him physical traits of that yōkai. Soul absorption requires saying "On!" with his right hand extended, drawing the soul into the kanji. Overuse causes glowing red veins and agonizing pain that could prove fatal. Absorbed powers include:
- Kijin: Gains oni-like arms with crushing strength and clawed fingers capable of slicing metal.
- Hitotsumebō: Develops a third eye granting long-distance and X-ray vision.
- Mujina: Acquires shapeshifting abilities.
- Bake-Bi: Manipulates fire harmlessly.
- Nue: Transforms his arm into Nue's head for its pain-inducing roar.
- La Seine: Presumably gains vampiric traits.
- Ibukimaru: Gains swordsmanship and dimensional travel capabilities.
- Konaki-Jijii: Modifies weight and turns to stone.
- Nurikabe: Fuses with earth.
- Sunakake-Babaa: Controls sand.
He also wields paper talismans for barriers and combat, creates Raijodo replicas to incapacitate foes, and uses noise-canceling earplugs for auditory defense.