Seo

Seo (先生, Seo) is a mystery; he appears to Arata Hinohara out of nowhere to offer advice and disappears shortly after. Seo's a Himezoku often help out Arata with his adventure when needed.

Appearance
Seo is tall with blue hair and blue eyes.

Personality
Seo has a friendly attitude and acts kindly to Hinohara. Seo does not take things too seriously and isn't one to become frightened easily.

Gatoya Arc
Arata Hinohara in a fit of rage towards Tsukuyo while unable to find the missing Kotoha, is confronted by Seo a falsely convicted criminal.

He listens to Arata's problem and his quest to save the Princess, Kikuri and questions why he took such a job, and guides him towards Kotoha, by telling him to take full awareness of his surroundings and then disappears when Arata looks back.

Arata Hinohara
Arata Hinohara is considered to be Seo's student.

Trivia

 * When translated from kanji, Seo (先生) means Sensei.
 * Since the kanji for Seo means sensei, Seo name is most likely an alias and that his true name is "Amahi", point out by Saruta.