A native of Togoria and an aficionado watcher of sc'rath duel, she eventually left her world and became a Rebel-aligned privateer and smuggler. Mei provided Rebel cells in Imperial worlds with supplies and weapons. During this time, she was also revealed to be an excellent fighter.
On 1 BBY, she joined Alliance Intelligence; and in 2 ABY she became a member of starfighter unit Storm Squadron. She was also a member of the Rebel Alliance Task Force on Alliance Security; in that role, she wrote a report on Mlatar Thon Gra, a Togorian who was a threat to the Rebel Alliance. Mei specified that Gra was a great weaponsmith and swordmaster, and that he would attack unprepared enemies.