Tomioka Giyu

His name is Tomioka Giyu and he is a water hashira. He is very cold hearted and Depressed because when he was too young his mom and dad died to a illness and his older tsutao died to protect him from demons. and then he was trained by Urukodaki and his fellow student sabito who quickly became his Best friend . and at the final section sabito died to protect everyone. and he became Depressed after all of that....