Yuuki Miyata

Minami's best friend who has been with her since they were babies. She has had a condition since when she was little and had become hospitalized after becoming the manager of the baseball team. She joined the team having been admired seeing Minami play baseball as a kid, and dreams of taking her team to the nationals.

[Spoiler] However, just as the team reach the finals of the prefectural tournament, she succumbs to her terminal illness and passes away. [/Spoiler]