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.

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.