En

En (遠) is the brother of Haruka and, for most of the story, the body that the Sousui inhabits.

Appearance
He is a young boy with dark hair.

Personality
En's personality is largely unknown, because his mind and body are entirely under the Sousui's control for the majority of the story. His personality only truly begins to emerge after the Sousui's death, where his only concern is Haruka's safety.

Plot
En remains under the Sousui's mental control until he is released upon the Sousui's death, at which point his body collapses. He remains unconscious for some time, finally waking up as Masamori Sumimura carries him away from Hakuma. En's first thought is of Haruka's safety, and he panics after seeing her unconscious in Souji's arms. He calms down after Masamori assures him that she is only sleeping.

Powers & Abilities
Spellcasting: En's only confirmed ability is spellcasting, which he clearly has enormous potential at. It is apparently the main reason the Sousui chose him as a host (another being his connection to Haruka).