Her role isn't mentioned in the trade report but we've been hearing a couple of the female roles which are plenty could include Kirk's rival which is
a female Starship Captain who could be younger or Nurse Chapel a crew member that Kirk has sexually harassed chasing her off the ship.
He needs the right mate to win his mating rings, but choosing one
female from among the neighboring systems while slighting the others could start an interstellar incident — and this ex-mercenary
starship captain has finally had enough of war.