木戸晋作

He is a moderately-lecherous drunkard who becomes the coach of Kisaragi Girls High Baseball team. He has connections to both Keiko Himuro and Hidehiko Hayakawa from when they were all younger. In fact, he was Hidehiko's catcher when they were in high school. Despite his very unconvincing and laidback appearance, he is actually quite observant person, a master strategist and has superior insights and judgements in baseball games.

(Source: Wikipedia)