Hanako-kun

Name: Hanako

His real name is Yugi Amane.
Titles: Hanako-san of the Bathroom, Honorable Number 7 of the School Mysteries.
Age: 13 years (physically), 60+ years (chronologically)
Gender: male
Height: ~150cm
Species: supernatural (ghost)
Rankings: Leader of School Mysteries
Allies: Yashiro, Kou, School Mysteries

Hanako is a short boy with dark hair and large amber eyes. He wears an ancient black gakuran and has an exorcist's seal on his left cheek. It is also usually seen accompanied by two spirit spheres named Haku-Joudai.

(Source: Hanako-kun Wiki)