She played college basketball for the Hawaii Rainbow Wahine, where she won the Big West Conference Player of the Year in 2022.

She had briefs stints in the Women's National Basketball Association (WNBA) in 2022 with the Los Angeles Sparks and in 2024 with the Phoenix Mercury.

[1] Atwell moved to the United States in 2016 to play college basketball for the Hawaii Rainbow Wahine.

[10][11] She returned to the Mercury in September 2024 on a seven-day contract,[12] debuting against the Washington Mystics and scoring two points in four minutes in a 13-point loss.

[19] She led the Braves to the NBL1 South championship behind her Grand Final MVP performance of 36 points, eight rebounds and two assists in an 83–78 win over the Waverley Falcons.

[24][25][26] In game one of the Lynx's grand final series against the Southside Flyers, Atwell had a game-high 30 points and a career-high nine 3-pointers in a 101–79 win.

[37] In July 2024, Atwell was named in the Australian Opals' squad for the Paris Olympics as a replacement for Rebecca Allen.

[41] As of July 2024, Atwell's partner is fellow basketball player and Perth Lynx teammate Ally Wilson.