Maiko Shindo, also known as "Mako" in some manga variations, is Shuichi Shindo's younger sister, approximately three to four years his junior. She appears as a first-year student in the initial manga volumes and as a senior in the sequel *Gravitation EX*. Physically, she is slender and petite, bearing a strong resemblance to Shuichi with large eyes and a delicate facial structure. Her hair and eyes are typically illustrated as light brown, differing slightly from her brother. Her personality blends intelligence, kindness, and modesty with high energy, haughtiness, and passion. This driven and assertive demeanor contrasts with Shuichi's more laid-back attitude, occasionally leading to perceptions of her as nagging or bothersome in their interactions. Her narrative role is most prominent early in the manga, where she primarily encourages Shuichi to pursue a meeting with Tohma Seguchi after his first concert, acting as a catalyst for key series events. Her appearances decrease considerably throughout the main narrative, though she features intermittently in cameos and one-off scenes during the latter half of Act 1 and in *Gravitation EX*. She resides with her parents while attending high school and maintains a romantic relationship with her school's student council president. Her fandom interests include admiration for the novelist Eiri Yuki, noted early in the series. Her sole animated depiction occurs in a brief scene during the second episode of the OVA *Gravitation: Lyrics of Love*.