- Voice Actor (CV)
- Kikuko Inoue
- Role
- Supporting
- Identity
- Elder sister of Makoto Sunakawa and a first-year student at Nagoya Ouzaki University, serving as a warm-hearted guardian figure throughout the story
Personality
Composed & Mature
Candid & Straightforward
Emotionally Perceptive
Quietly Devoted
Ai Sunakawa is Makoto's older sister, currently navigating her first year of university life. Since childhood, she has harbored deep feelings for Takeo Goda, yet chose to keep those emotions hidden out of respect for the age gap between them. Initially skeptical of Rinko Yamato's sincerity, she gradually opened her heart after witnessing the genuine bond the couple shared, ultimately becoming one of their most devoted supporters. Behind her composed and intellectual exterior lies a surprisingly tender and pure emotional core, making her one of the most memorable and beloved older-sister figures in the series.