a quality that suggests someone is acting in a way that is slightly bad or wrong, but not seriously so

She has a charming roguishness. 她有一种迷人的调皮气质。

His roguishness makes him a likely choice to play Vlad the seducer. 他的流氓气质使他有可能成为扮演诱惑者弗拉德的人选。