Eishin Kuga

Eishin Kuga (久我 瑛心, Kuga Eishin) is a character in the Saezuru Tori wa Habatakanai (Twittering Birds Never Fly) series. He is a former delinquent who grew up in an institution.

Appearance
Eishin has styled dark hair and piercings in his ear.

Eishin is seen wearing a short sleeved dark collared shirt.

Personality
Nicknamed 'mad dog', Eishin has a volatile and prone to violence personality who would like to decide for himself where he ends up.

A problematic man who likes to fight and lives his life on his own way, doing what he wants and not letting others step on him despite of the fact that he can't get a normal job and life. He is called "the mad dog" and while being scary and strong in fights, he likes to have fun and tease others.

Story
Eishin is with Yashiro, interrogating another man seemingly on his orders. He is prevented from going too far by being knocked out by Kanji Kageyama.

Recovering at Kageyama's house, he discusses matters including the burn marks on his body.

Giving Kageyama money he acquired, he leaves his house but is later brought back by him.

Yashiro
A yakuza boss who he refuses to work under.

Kanji Kageyama
A doctor who helps take care of him even after Eishin headbutts him.

Etymology

 * The name Eishin means "sparkle of jewelry, crystal" (瑛) (ei) and "heart, mind, soul" (心) (shin).
 * Eishin's surname Kuga means "long time" (久) (ku) and "I, me/my, self/oneself, ego" (我) (ga).