Hanger-on noun
Someone who hangs around with a famous, rich or important person or group of people in order to get personal advantage from them.
Despite being a magnet for hangers-on and overzealous admirers, John's still a poised and polite young man.
Mary's such a hanger-on. When I was poor, she avoided me, but now I'm rich, she is always following me.
Used to refer to a person who flatters people who are powerful
This noun dates from 1540s.
Used to indicate that helping each other or working together toward the same goal will have advantages for everyone who is involved
The relationship between fashion and film is that one hand washes the other and both wash the face.