cheerleader

noun
1
(especially in the US) one of the members of a group of young people (usually women) wearing special uniforms, who encourage the crowd to cheer for their team at a sports event
تشویق‌چی
2
a person who supports a particular politician, idea, or way of doing something
حامی, مدافع, تشویق‌کننده, هوادار
one of the leading cheerleaders for the President’s welfare policies