Saburô Kido

In 1997, Donkey became a teacher in a technical school. Married and father of a boy, he lost almost all contact with his old friends. It investigates a little too close to Friend, and sends letters to Kenji about it and it will lead to his assassination by Masao and another henchman of Friend. His death is the starting point for the investigation of Kenji, equally shocked and saddened his friends Donkey's death.