Jap name: 魔夜由愛

Sharenaya is a demon who's from the demon world. Her special ability is to cast an image copy of herself into people's dreams. Although she went into Earth Realm (Midgard in Hyperborean) to cause nightmared and freak out the masses, she decided to study a bit at Yggdrasil Elementary.

She has the "Excalibur-R2", which is a duplicate version of the sacred blade Excalibur. In addition to this, Sharenaya can also copy moves used by her opponents.

Her job is to serve as the backup math teacher whenever Hyacinth is at the auditions. Because of this, she has to study ahead of her classmates so she can get ready to teach anytime Hyacinth leaves. But she's really shy, so she fails as teaching.