Beverly was a lot of things! Most promenently the CMO on the Enterprise but also the mother of Wesley Crusher, an at the time Starfleet Academy student and ensign on ship who also was a recurring main character in the show.

Crusher was driven, brave, sweet, funny and always level-headed. She spent a lot of time working in the sickbay with both patients and scientific experiments. My favorite Crusher-centric episode is
4x05, "Remember Me", give it a watch!