trouper
US /ˈtruː.pɚ/
UK /ˈtruː.pɚ/

1.
a member of a theatrical company
:
•
The old trouper still remembered every line of the play.
•
She joined a traveling trouper right after college.
2.
a person who is reliable and does their job well despite difficulties
:
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She's a real trouper, always cheerful even when things are tough.
•
Despite the long hours, he was a true trouper and never complained.