Yuu Kusaka  

, 久坂優

The protagonist of our tale is a kindhearted individual who serves as an Ayakashi caretaker, dedicating his efforts to fulfilling the commitment he made to Hime and Izumi two years prior to the story's beginning. This promise involved safeguarding them. Notably, this character possesses the most powerful of all Ayakashis - Ryuu, a dragon-like being who was once deeply in love with Izumi but has since changed his affections towards Hime and Eimu.