A student at Kitahoro High School. She has long black hair and dark brown eyes. Due to her quiet and gloomy aura, she is nicknamed "Sadako," and many students believe that is her actual name. Since Sadako is the name of a ghost, rumors circulate that Sawako can see spirits. In reality, she is extremely kind, pure, and diligent. She loves helping others and is proactive in class duties. Though initially clumsy at expressing her emotions, she grows significantly. She is a character who gains confidence through friendship and love. While she first admired Kazehaya, she is now harboring a secret crush on him.

He has spiky black hair and black eyes. A student at Kitahoro High School. A popular, cheerful boy in class. He is kind, sociable, and straightforward. He sees Sawako for who she really is, rather than the image others have of her. He naturally approaches Sawako first, becoming the catalyst for her change. He likes Sawako, whose name means "refreshing girl." While he appears relaxed and bright on the outside, he can be surprisingly jealous or blunt in front of the person he likes. He has been best friends with Ryu since middle school and is a member of the baseball club.

She has spiky light brown hair and black eyes. A student at Kitahoro High School. One of Sawako's best friends. She has a lively, loyal, and direct personality. She is the type to actively step in when a friend is in trouble. Though she looks rough and tough on the outside, she is actually very sentimental. She loves ramen and has known Ryu since they were children. She likes Ryu's older brother and is completely unaware that Ryu likes her.

She has wavy light brown bobbed hair and brown eyes. A student at Kitahoro High School. One of Sawako's best friends. Compared to Chizuru, she has a calm and mature atmosphere. She is quick-witted and good at reading people's emotions. She plays the role of giving realistic advice to her friends. Though she can seem cold at times, she cherishes her friends deeply.

He has cropped black hair and black eyes. A student at Kitahoro High School. Kazehaya's best friend since middle school and a member of the baseball club. He is a man of few words and tends to be blunt. He is the type to show his feelings through actions rather than words. He loves baseball and is athletic. He has known Chizuru for a long time and has an unrequited crush on her. While he often fails to remember people's names or trivial details, he thinks deeply about the people who matter to him.

She has light brown hair and dark brown eyes. A student at Kitahoro High School. A famous beauty at school. On the surface, she maintains the image of a kind and cute model student. In truth, she can be quite calculating to achieve her goals. However, she is fragile at heart. She has liked Kazehaya for a long time. Initially, she is in a competitive relationship with Sawako. She hates being called "Ume" because she thinks the name sounds old-fashioned, so most students call her "Kurumi."

He has blonde hair and light brown eyes. A student at Kitahoro High School. A bright and playful boy. He has a sociable personality and makes friends easily. He tends to speak his mind quite honestly. He often plays the role of a mood-maker. He is a character who undergoes various emotional changes as he gets closer to Sawako.

He has brown hair and brown eyes. The assistant homeroom teacher of Sawako's class and a PE teacher at Kitahoro High School. He also serves as the baseball club coach. He often behaves playfully toward the students. Though he doesn't seem serious, he cares about his students quite a bit. He has also known Shota and Ryu since they were children.

Sanada Ryu's older brother by eight years, living alone in Sapporo. He first appears when he introduces his fiancée, Katayama Haruka, to his family. He became Chizuru's first love after he kindly comforted her when she was crying as a child. However, Toru only thinks of Chizuru as a younger sister and has no romantic feelings for her.