Mari Aieda is a supporting character in the anime Narenare -Cheer for you!- She is a second-year student at Takanosaki High School. She began cheerleading only after entering high school, and through steady, diligent effort she worked her way up to the school’s A team. Currently, for reasons related to the story, she serves as a practice assistant rather than a performing member.

Personality wise, Mari is caring and serious, with a strong sense of responsibility toward her teammates and juniors. She is known for being attentive and supportive, often tutoring younger students not only in cheerleading techniques but also in their academic studies. Despite her composed and hardworking exterior, she possesses a hidden fragility; her earnestness can make her vulnerable when things do not go as planned.

Her primary motivation is to support the cheerleading group and help her juniors grow, both as athletes and as students. In the narrative, she acts as a mentor to Kanata Misora and other members of the PoMPoMs group, offering guidance and encouragement. Her role as a practice assistant places her in a supportive position, where she contributes to the team’s development without being in the spotlight.

Mari’s key relationships are with the main characters she mentors, particularly Kanata. She also interacts closely with the other upperclassmen on the team. While her personal backstory is not extensively detailed, her diligent climb from a beginner to an A-team member demonstrates her determination and resilience. Her notable abilities include a solid foundation in cheerleading skills and a talent for teaching and motivating others. Throughout the series, she embodies the theme of steady effort and the importance of supporting one another.