Aika appears to be a cute, diligent, and friendly girl who is well-liked by her classmates. She is hardworking and often gets frustrated when she feels she isn’t performing well enough. Though she can come across as harsh, especially when dealing with Wataru Sajou, she is inherently kind and caring. She has little prior interest or experience with romance, which makes understanding and navigating matters of love challenging for her.

However, when Wataru decided to keep his distance from her, Aika found herself confused and unsettled. She begins to realize how much his presence had impacted her life and emotions, forcing her to confront feelings she had never fully acknowledged before.

In middle school, Aika experienced her parents’ constant busyness and the strain of their financial difficulties. Witnessing their hardships, she took on the responsibility of managing household chores and caring for her younger sister, which shaped her into a dedicated, diligent, and hardworking individual. Her commitment to her studies was equally strong, as she meticulously prepared for exams and focused on achieving academic excellence. Her efforts paid off when she was accepted into the prestigious Kōetsu High, a milestone that reflected both her intelligence and perseverance. It was at Kōetsu High that Wataru Sajou, who had long admired her, eventually followed her, marking the beginning of a complex and evolving relationship between the two.