- Voice Actor (CV)
- Kikuko Inoue
- Gender
- Female
- Role
- Supporting
- Identity
- A mathematics teacher and homeroom instructor at Icho Private Academy, also serving as the faculty advisor for student club activities
Personality
Outwardly gentle yet strategically sharp
Broad-minded and accepting
Distinctive speech pattern with elongated vowels
Playfully humorous
Affectionately nicknamed 'Nana-sensei' by her students, Tsukumo Nanase is a beloved figure at Icho Private Academy. Her warm smile and characteristically drawn-out speech give off an easygoing vibe, yet beneath that approachable exterior lies a perceptive mind skilled at steering conversations with quiet precision. Rather than dismissing Rikka's chuunibyou tendencies, she embraces them wholeheartedly—even lending a hand in establishing the students' club—embodying the rare role of a mentor who is equally a trusted friend.