Kanade Sakurai (櫻井 奏 Sakurai Kanade?) Voiced by: Hitomi Nabatame The younger twin, although generally considered more mature than her sister. She is also somewhat easy to ruffle emotionally, especially by Yukino. She often worries that Yukino is sacrificing herself for her benefit. Kanade is an artist and wants to pursue art studies, however, she understands that it would be difficult to pursue a career in the field and maintain a close relationship with Yukino.
Yukino Sakurai (櫻井 雪乃 Sakurai Yukino?) Voiced by: Ryōka Yuzuki The older twin. She likes snacks and often trades photos of Kanade to Sakuya for them. She is a member of their school's swim team and writes a daily blog about her life. She cares deeply for Kanade and will support her in any way she can.
Sakuya Kamiyama (神山 咲夜 Kamiyama Sakuya?) Voiced by: Emiri Katō An extremely wealthy freshman who has an obsessive crush on Kanade. She is prone to stealing Kanade's things for her collection. Despite her overwhelming presence, the twins seem to like her.
Shizuku Sakurai (櫻井 雫 Sakurai Shizuku?) Voiced by: Yū Kobayashi Kanade and Yukino's younger sister, nicknamed Shi-chan. She hates being apart from her sisters. She is a lot more level-headed than her sisters. She is deeply affected by the actions of Yukino, who she seems to care about more than Kanade. 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.
Characters who appear in the two manga series.
Yuriko Takanashi (小鳥遊 ユリ子 Takanashi Yuriko?) Kanade's classmate, known as Yuripe (ユリペ?) for short. Her parents own a restaurant and she is quite good at cooking. She generally scolds Kanade for her perverted thoughts about Yukino.
Isako Mikanagi (御巫 いさ子 Mikanagi Isako?) Sakuya's classmate and self-proclaimed rival. She also has a crush on Kanade, though later reveals that she loves Sakuya.
Eri Miyagi (宮城 えり Miyagi Eri?) Sakuya's classmate.
Masumi Kurasuma (烏丸 ますみ Kurasuma Masumi?) Sakuya's classmate.