I'm sure everyone must have come across a person in their lives, who doesn't seem to have his own opinion, and says yes to everything the person that he's in awe of says. Please suggest any good phrasal verb here.

E.g. There's that girl X who's pretty famous in let's say, the college, and she has two girls with her all the time who are so impressed with her and are trying to be on the same level as her, because X is super famous, pretty and rich. The other two girls think, they'd become cool too if they start roaming around with her. And when conversing, those two girls never object X in anything whatsoever. Please help me out. English is not my mother-tongue, and I'm still trying to master it