- Voice Actor (CV)
- Yuuka Aisaka
- Gender
- Female
- Age
- 15
- Birthday
- August 8
- Role
- Protagonist
- Identity
- A first-year student at Yougetsu Academy who awakens as Tail Blue, the aquatic warrior of the Twin-Tails squad
Personality
tsundere
fiercely competitive
self-conscious about her figure
grounded voice of reason
intensely protective
Aika Tsube is the childhood friend of protagonist Souji Mitsuka, having trained in martial arts since a young age. Harnessing the power of elemental energy, she transforms into Tail Blue, wielding a water-elemental lance in battle. Though she projects a bold, competitive exterior and harbors deep insecurities about her petite figure—often venting her embarrassment through bursts of aggression—she serves as the team's calm, level-headed anchor. Beneath her fierce façade lies a profound, heartfelt devotion to Souji.