Ennunien


 * For the school, see Great Tree Ennunien

Ennunien (エニユニエン) is the spirit born from the rumors and legends of the "Great Tree of Learning". He also acts as the Spirit School itself.

Appearance
Ennunien's body is the Great Tree Ennunien, but he can manifest himself as a large humanoid face on a tree.

Personality
Ennunien has the voice of a hoarse old man, but is very calm and composed. As a teacher, he gets very excited when a student asks a question. However, he is very sensitive about his teaching and gets angry after the class criticizes his bad drawings. He eventually calms down after Anos correctly guesses his drawings and graduates him instantly, showing a self-serving side despite being an educator.

History
In the spirit school, they teach about various spirits and their history. There are all kinds of other lessons, but the one that is required is the spirit class. These extra courses include swords, magic, cooking, arithmetic, training and raising spirits, creating spirits, etc.

Great Spirit Arc
After hearing that the demons from 2,000 years ago were in the spirit school, Anos and his group head there and meet Ennunien. He explained how the school works and began the class. To make it easy for them, he gives an assignment about famous spirits and draws three figures to identify. When Rina mutters about the poor quality of the drawings, Ennunien sees this as an attack on his teaching and gets angry, but calms down after Anos correctly responds.

After class ends, Anos asks to reduce the number of tests he has to take before being able to take the spirit trials, but Ennunien tells him he can't condense it all into one. However, Anos successfully sways him into doing so by comparing his school to the Demon King Academy, where it would be possible due to the teachers' flexibility.

Abilities

 * Magic Space: Ennunien seems to be skilled in spatial magic. When class starts and the doorway disappears, he sends the whole classroom into a magical space devoid of anything. There is also a swamp inside Ennunien that is inhabited by the Long Snake Epiteo, who is said to be long enough to encircle the world 333 times.
 * Magic Eyes: As a spirit that specializes in education, Ennunien has magic eyes that excelled at detecting cheating. Its power increases even more in his body.

Trivia

 * The earliest he had ever graduated someone was two weeks, and the longest was 50 years. However, Anos successfully beat this record by Day 1 by getting into Ennunien's good graces.