Once host to the Tok'ra Jolinar of Malkshur. Rosha was described as having eyes like the oceans of Marloon and hair the color of the sands of Abydos. She maintained an intimate bond with Martouf, host to Lantash, and the two couples remained companions for a century.
Rosha was still host to Jolinar when she traveled to Ne'tu on a mission for the Tok'ra (or perhaps was captured and sent there). She was taken by Bynarr and tortured with pain sticks as the Goa'uld Sokar watched in amusement. Secretly she seduced Bynarr to gain access to the key around his neck that activated the ring transporter in his quarters. She materialized on Delmak and procured a ship to escape.
It is not known when Rosha was lost, but it was some time between this point and when Jolinar escaped into the Nassyan population.
The Tok'ra, Part 1 - Martouf mentions Rosha and describes her so that Carter can put a face on her.
Jolinar's Memories - With the aid of a Tok'ra recall device, Carter remembers Rosha and Martouf's last night together before she went on her mission.