trouper
/ˈtruːpə(r)/noun
1- an actor or other entertainer, typically one with long experience（尤指经验丰富的）巡回演出团演员。
1.1
- a reliable and uncomplaining person值得信赖、任劳任怨的人：
a real trouper, Ma concealed her troubles.
妈妈真是任劳任怨, 自己的苦恼总是藏在心里。