Marina

Long blonde hair. A 4th-grade elementary student. She bullies Shizuka, who is in the same class. Cheerful and has many friends. At home, she suffers from neglect by her mother. The reason she bullies Shizuka is that Shizuka's mother and Marina's father became close and started meeting frequently, leading to her father not coming home anymore.

Azuma

Wears glasses. The class representative in Shizuka's class. Serious, but secretly harbors feelings for Shizuka.

Marina's Mom

After her husband started seeing Shizuka's mother, she developed a mental illness-like condition. She is very harsh toward Marina.

Marina's Dad

He is in a relationship with Shizuka's mother.

Shizuka's Mom

Since divorcing her husband, she has been in a relationship with Marina's father. She is cold toward Shizuka.