Shinsaku Kido  

, 木戸晋作

The coach of Kisaragi Girls High Baseball team is a man who enjoys drinking heavily and pursuing women with moderate success. He was once the catcher for Hidehiko Hayakawa during their high school days, and also has connections to Keiko Himuro. Despite appearing carefree and unmotivated, this coach possesses exceptional observational skills, strategic thinking, and discernment in baseball games.