Mr. Yamai

Mr. Yamai is a character in The Night Beyond the Tricornered Window manga. He is the manager of the book store that employs Kosuke.

Personality
Curious, he asked how Rihito exorcised the ghosts and found it quite impressive.

Appearance
He appears as a middle-aged man, with light colored hair. His attire consists of thin framed glasses and a collared white shirt.

Tricornered Window Story
Yamai is listening as Rihito explains his supernatural based powers.

Contacting Kosuke by phone, Yamai informs him that rather than attend his shift, Rihito has arranged a meeting in Asagawa and has emailed him the address.

Kosuke Mikado
He was shocked when his employee bluntly asked whether Rihito was a fraud.

Rihito Hiyakawa
Impressed with the exorcist, Yamai is asked by him to let him have Kosuke.