a magical character in some children's stories who helps someone who is in trouble

Cinderella's fairy godmother helped her go to the ball. 在仙女的帮助下，灰姑娘参加了舞会。

someone who unexpectedly arrives to solve your problems or make good things happen to you

The company played fairy godmother by deciding to sponsor the club for another five years. 公司决定再赞助这家俱乐部5年，成了俱乐部的救星。