Sakuya's classmate. Always acts high and mighty; she proclaims herself as Sakuya's rival in conquering their Kanade Sakurai's heart. It is later revealed that she is very poor since the death of her father. While she seemingly competes Sakuya for winning Kanade's heart, it the end it turns out that it is in fact Sakuya that Isako has feelings for.
Yukino is the older amongst the two. She's very fond of snacks and Sakuya often trades snacks with Yukino for Kanade's pictures. She is a member of their school's swim team. Later in the series, Yukino decides to work part time in order to be able to pay for Kanade's art cram school. However, Kanade refused at this because she felt that if Yukino started working part time and she attended the art cram school, they will get to spend less time with each other. Yukino insisted and started working anyway which in turn created a strain in their relationship.
A marionette possessing the otome kairo, a circuit that enables her to act almost indistinguishable from a human girl. She is the most child-like of the main marionettes, with a naive, lively, sunny, peppy and playful personality . ("Yoo-hoo" becomes something of Lime's catchphrase), and thus frequently asks all manner of questions about life to Otaru. The quickest of the three; she has amazing speeds that can even out rival the Hanagata Mitsurugi 3000GT seen in Ep 1. She has long blue hair that is pulled back with a long yellow scarf with a red ornament bubble. Her clothing consists of a white, yellow trimmed, "jacket" over a black bodysuit. When Walking, Lime's feet make a squeaking sound not unlike a cross between gears squeaking and the squeak of a toy hammer. (Source: Wikipedia)
Kanade and Yukino's much younger sister. Shizuku is a lot more level-headed than her sisters. She is deeply affected by the actions of Kanade, who she seems to care about more than Yukino. Unlike her sisters, she buries all her emotions deep down without expressing them but they later resurface in various ways, such as her cutting school. She also appears to be very passive-aggressive. Despite Yukino's attempts to become closer to her, Shizuku clearly spurns the attention of her older sister. This is possibly due to jealousy she feels, as Kanade spends more time with Yukino, and Shizuka would prefer that Kanade pays more attention to her instead. She seems quietly aware of the deeper relationship that her sisters may have.
Sakuya's classmate. She seems to be the most level-headed of the group. She and Masumi are childhood friends. It is hinted that she might have a crush on Masumi.
Isako's mother. She has been raising her daughter alone and has been doing multiple jobs, since Isako's father died.
Sakuya's classmate and Eri's childhood friend. She is energetic and loves her stomach. It is hinted that she might have a crush on Eri.