bridesmaid
noun [ C ] uk/ˈbraɪdz.meɪd/ us/ˈbraɪdz.meɪd/
伴娘，女傧相
a girl or woman who during the marriage ceremony helps the woman who is getting married
Idiom
always a bridesmaid, never the brideidiom saying 永远是配角（指某人在任何事情中都未担当过最为重要的角色）
said about someone who is never the most important person in a situation