The young fast bowler earned her maiden WBBL contract ahead of WBBL|09, after impressing for Western Australia in the Women's National Cricket League.
Ainsworth is a star on the rise, with her raw pace and ability to swing the new ball a major feature in her game.
She starred for WA at last year's Under 19s National Championships as an allrounder, collecting 10 wickets at 15.10 and 175 runs at 35.
The 18-year-old will be hoping to cement herself as a regular in the Scorchers line-up during WBBL|09.