The character you are referring to is Cara Dune. Cara Dune, portrayed by actress Gina Carano, is a former Alliance trooper who becomes a mercenary in "The Mandalorian" series. She is a skilled warrior and eventually joins forces with the show's protagonist, Din Djarin (the Mandalorian), on various missions. However, it's worth noting that Gina Carano was removed from the series following controversies, and her character's future involvement may be uncertain.