- Voice Actor (CV)
- Ayaka Asai
- Gender
- Female
- Role
- Protagonist
- Identity
- Biological daughter of the former Demon Lord Wilbert (demon lineage), adopted sister of Basara Toujou, student at Hijirigasaka Academy
Personality
Tsundere
Determined and courageous
Warm-hearted
Easily flustered
Mio Naruse serves as the central heroine of the series. Though she appears in the role of Basara Toujou's adopted sister, she secretly carries the immense power inherited from the previous Demon Lord. Her extraordinary lineage has made her a coveted target for numerous rival factions since childhood. After forging a master-servant pact with Basara, the two stand together against formidable adversaries. Beneath her bold and assertive exterior lies a genuinely tender soul, and through their shared daily life, she gradually develops deep and irreplaceable feelings for him.