Haruka Takayama:
Haruka is Yuu's closest friend since junior high school. She is the childish one out of the two. She often pushes Yuu to her demands unknowingly (like kissing her just to keep her quiet), and is the extremely jealous and clingy type of person as described by Yuu. Haruka seems to harbor romantic feelings for Yuu, a reason why she is more affected by their seat arrangement than Yuu is.

Yuu Sonoda:
Yuu is Haruka's closest friend since junior high school. She often acts more maturely than Haruka, but occasionally gives in to Haruka's requests. Yuu initiates that she and Haruka do something special together, in order to comfort Haruka's growing insecurity of their friendship.

Shizuku Minami:
Haruka and Yuu's classmate and Kotone's cousin. Has a generally sour look, meaning her happy or angry expressions tend to look overblown. She also shares a kissing relationship with Kotone.

Kotone Noda:
Haruka and Yuu's classmate and Shizuku's cousin who is living with her. She is bright and energetic.

Kaede Ikeno:
Haruka and Yuu's classmate and their class representative. She went to middle school with Yuzu and Kotone and has two siblings; a brother and sister.

Yuzu Iizuka:
Haruka and Yuu's classmate. Is on good terms with Kaede.

Mitsuki Sonoda:
Yuu's older sister and the school's student council president. She is suspicious of the relationship between Haruka and Yuu. She seems to have a crush on Haruka.