A high school boy who ran away from home to Tokyo. Though reality is harsh, he has a personality that doesn't give up easily. After meeting Hina, he gradually becomes braver and more honest in expressing his emotions. He is the type to risk making major choices for the person he loves.

A bright and kind girl with the power of a 'Sunshine Girl.' She always tries to smile, but she is mature and has a strong sense of responsibility deep down. She acts as the head of the household while taking care of her younger brother. She has a warm personality that prioritizes the happiness of those around her over her own sacrifice.

Hina's younger brother. Although he is an elementary school student, his speech and behavior are very mature. He cares for his sister deeply and is quick to judge situations. He is a cute but surprisingly popular character.

An adult male who runs a small publishing company. He seems indifferent at first, but he is a warm-hearted and humane person inside. While helping Hodaka, he gradually becomes a guardian-like figure. He is a realistic character who struggles between past wounds and current responsibilities.

An employee at Suga's company. She is bright, energetic, and takes good care of Hodaka. Her driving skills(?) and decisiveness are impressive. She is an energetic person who lightens the atmosphere.

A police detective chasing Hodaka. A realistic adult who values principles. He appears calm and cold, but he has a tenacity to dig into a situation until the end. He is one of the characters who creates tension in the latter half of the story.

A detective who works alongside Yasui. He shows a relatively flexible attitude and sometimes reveals a more human side. He does not view Hodaka as just a simple criminal.

An elderly woman who requested a clear day in front of her husband's grave. She is an important figure who first showcases Hina's abilities. Though her appearance is brief, she plays a role in clearly expressing the film's atmosphere and message.

Although she doesn't appear much in person, she is a presence that greatly influences Suga's choices and actions. She is the reason Suga agonizes between responsibility and reality. She is Suga's daughter and has asthma.