有珠宮 葵

An intelligent, noble maiden who can transform into Orion Moon. 

She was watching the relationship bloom between Yuka and Osamu with warmth in her eyes, but never in her wildest dreams did she imagine that a demon was creeping between the two. 

When she finally notices, it’s too late, and both she and Yuka fall into Gildart’s trap, corrupting their pure and innocent bodies as he pleases.

MangaGamer