- Voice Actor (CV)
- Ai Kayano
- Gender
- Female
- Age
- 10
- Birthday
- August 27
- Role
- Protagonist
- Identity
- The 10th Demon Lord, a young demoness who inherited the legendary title of 'Alumiris'
Personality
Composed & levelheaded
Domestic all-rounder
Deeply responsible
Cool-minded rationalist
Ruki carries the fearsome legacy of the Demon Lord lineage as its tenth successor, concealing overwhelming power beneath her youthful appearance. Journeying alongside the hero Aruba and the warrior Ross, her mission is to seal away demon creatures that have strayed into the human realm. Far from merely a powerhouse in battle, Ruki serves as the group's steadfast anchor—managing camp chores, caring for her companions, and keeping morale steady. This striking contrast between her nurturing nature and her legendary title makes her one of the most compelling characters in the story.