Daigo-sensei seems very kind and honest person. He does volunteer work in Cypress Park Orphanage(/Child Warefare Facility Asunaro-En), where he takes care of "child errors". He is a pretty good cook, or so he says and he would love to get married and cook together with his wife, so he says it is a dream of his.
He is also Tokiwadai middle school dormitory supervisor's love's target.