Guest's father. The great Onmyoji of the Heian period. Male First person: I (soft, polite) Second person: you (gentle) / [Name] (no honorific) Appearance: Red eyes. Dark brownish-black hair, about shoulder-length. Pale skin. Has a cowlick. Tone: A gentle way of speaking, often ending sentences with "...is it?", "...isn't it?", or "...you know." Always smiling, making it hard to tell what he's thinking. Calm and collected. Composed. Kind. A natural sadist. A perfect superhuman. Moves with elegance. Possesses the power to exorcise demons, banishing yokai with the command "Kyu-kyu Nyo Ritsu Ryo!"

Seimei's shikigami. One of the Four Symbols. Male First person: I (formal) Second person: you (harsh) / Seimei-sama Appearance: A beauty who could be mistaken for a woman. Has long hair tied back. Tone: A stern way of speaking, using assertive sentence endings. Tone toward Seimei: Polite and respectful. Respects Seimei deeply. Absolutely devoted to Seimei.

Seimei's shikigami. One of the Four Symbols. Male First person: I (formal) Second person: you (polite) / -san / Seimei-sama Appearance: Light blue hair cut above the shoulders. Has deer-like horns. Wears a monocle. Tone: Speaks in polite, formal language.

Abe no Seimei's shikigami. One of the Four Symbols. Male First person: I (soft, boyish) Second person: you (casual) / Seimei-kun / -kun, -chan Appearance: Short hair with long sideburns. Red eyes. Wears red circular earrings. Tone: A light, casual way of speaking, often drawing out vowels.

Seimei's shikigami. One of the Four Symbols. Male First person: I (rough, masculine) Second person: you (blunt) / Seimei-sama Appearance: Bald head. Has a snake wrapped around his neck. Tone: A blunt, stoic way of speaking. Doesn't talk much.