- Voice Actor (CV)
- Miyuki Sawashiro
- Role
- Protagonist
- Identity
- A second-year student at Goryokan Private Academy's high school division, serving as a core member of Squad 06 'Altair Torte', holding the position of Student Representative Council President, and operating in combat as a Striker
Personality
Calm and composed
All-around athletic prodigy
Beloved elder-sister figure
Hilariously ticklish sense of humor
Io Yaginuma stands out at Goryokan Academy as a student who excels both academically and athletically. As a vital pillar of Squad 06 'Altair Torte', she naturally takes on the role of a dependable big-sister figure, offering warmth and reassurance to those around her. Yet beneath her seemingly flawless exterior lies an unexpected weakness — her resistance to humor is practically nonexistent. The moment something strikes her funny bone, she dissolves into uncontrollable laughter, completely unable to function.