One of the twelve demons that Ruki is searching for. Feburar has a tendency to side with whoever seems to be winning at any given time.  She considers herself to be a "young maiden", despite being over 200 years old, and frequently shows clear signs of her old age like when her dentures will fall out while talking or her hips will begin to hurt. 

Voice: 

Sounds like an energetic grandma. Voice is p high.