Sam is the captain and coach of the team in my wheelchair basketball comic, Juggernauts. Usually, coaches and team staff aren't supposed to play, but in a lot of wheelchair sports, especially in social leagues that include regional teams, it can be a lot harder to get the numbers to actually make a team with all the usual staff. So it's pretty common to see people who are both player and staff, at least where I live, and where this comic is set (or teams with no formal staff at all).
Sam is an incomplete quadriplegic, and a multi-time paralympic medallist in both wheelchair basketball and rugby. Eventually, after a long and successful sporting career, she decided to retire from sport and move out into the country with her husband Kev (who I've already drawn). Eventually though, she grew restless and decided she wanted to take up coaching and started her own team to help teach one of the sports she loved to the next generation of players.
I'm still working out her actual personality at this stage, I'm thinking in her younger years she was probably a bit of a no-nonsense type that's mellowed a bit with age.

Fun fact: The Tasmanian Devil is the mascot for Australian Women's National Development Team, The Devils.