Yamerunja-sensei resembles Pierrot with purplish skin, round orange eyes with yellow sclera and two line markings running down, and a short mustache. He wears a colorful pierrot attire, with the left sleeve purple in color and the right sleeve red in color; the chest is purple, green, yellow and red stripped and the collar is yellow in the right side and green in the left side. The low part of his attire is purple and dark blue in color, with a star pattern, and ends in a wispy manner. He completes his attire with a pierrot hat, green and red colored in the sides. His most notable trait is the flute he carries, in a playing manner.
Abilities and Powers
He plays his flute to manipulate people.
Yamerunja-sensei has a varied atttack scheme:
He can summon musical notes to protect himself. Said notes must be taken down.
Inspiriting the player's Yo-kai by playing a musical tune, causing him the confusion status.
Swaying the player's Yo-kai to change places in the field by playing another musical tune.
Attacking a single Yo-kai by causing an strident noise.
Launching a volley of big notes on either the left, center, or right sides of the field.
A Soultimate attack which slowly expands its rank on the sides of the field. The player must move his/her Yo-kai to the center to avoid damage.
Yamerunja-sensei appears in Chapter 4 of Inaho's story, in which he lures small children with a tune of his flute, among them Inaho's little brother Riku. After being fought and defeated by Inaho and USApyon, he confesses he was being a bit lonely and agrees to release the children.
He may pay homage to the "Pied Piper" fairytale.
His name is derived from yamerunja (やめるんじゃ) which means "Stop it". Notably the ja part of written with the kanji 邪, which can be translated as "evil".