Rossi joined Warriors Women in 2018 although injury meant she missed the whole of last season.
The prop or hooker made her return for the first game of this season, with Warriors the first English team she has played for.
The Welshwoman previously played for her local club Hendy RFC before representing Ospreys at under-18s and senior level.
She also is currently in her second year at Cardiff Metropolitan University, studying Physical Education and Sport.