reformed character
noun [ C ] uk/rɪˌfɔːmd ˈkær.ɪk.tər/ us/rɪˌfɔːrmd ˈker.ɪk.tɚ/
改过自新的人；改邪归正的人；回头浪子
someone who has changed and become a much better person
He was in trouble with the police a lot when he was younger, but now he's a reformed character. 他年轻时经常犯事落到警察的手里，但现在他已经浪子回头了。