fairy godmother

US /ˌfer.i ˈɡɑːd.mʌð.ər/
UK /ˌfer.i ˈɡɑːd.mʌð.ər/
"fairy godmother" picture
1.

a benevolent mythical figure, typically a woman, who helps a protagonist in a difficult situation, often by using magic

:
In 'Cinderella', the fairy godmother transforms a pumpkin into a carriage.
She wished for a fairy godmother to solve all her problems.
2.

a person who provides unexpected help or support, especially in a difficult situation

:
When I lost my job, my aunt became my fairy godmother, helping me financially.
The anonymous donor acted as a fairy godmother for the struggling charity.