Tali'Zorah nar Rayya
Tali'Zorah nar Rayya is a quarian character in Mass Effect. She joined Commander Shepard in 2183 to aid him in tracking down Saren Arterius and averting the Reaper invasion of the galaxy. She returned to the Migrant Fleet for a couple years and joined the crew of the Neema, becoming Tali'Zorah vas Neema.
During this time, she acted as a special agent for the quarians before rejoining Shepard in 2185 to investigate and defeat the Collectors. While working with Shepard, she was accused of delivering dangerous geth components to the Alarei and stripped of her ship name, becoming Tali'Zorah vas Normandy.
When Shepard was taken into Alliance custody following the Aratoht incident, she returned to the Migrant Fleet again. She attempted to organize fleet preparation for the return of the Reapers and was given the rank of Admiral for her expertise, taking her father's seat on the admiralty board. She opposed the fleet's attempt to retake Rannoch from the geth, mostly because she considered the risk too great.