Mass EffectMass Effect is a science fiction role-playing game series developed by BioWare. The plot centers around a human soldier named Shepard (male or female) and the mission to save the Galaxy from a biomechanical race of the Reapers.
More information: Introduction to Mass Effect series.
Tali'ZorahTali'Zorah nar Rayya (or simply Tali), voiced by Liz Sroka, is introduced in Mass Effect as a young quarian machinist. Soon she becomes a member of commander Shepard's squad.
She reappers in Mass Effect 2. Shortly after the events of Mass Effect, Tali joins the crew of the Neema starship and earns the title Tali'Zorah vas Neema. Later on in the game, her title changes to Tali'Zorah vas Normandy.
If she survives the final mission of the second game, she appears in the Mass Effect 3 and reunites with Shepard. If Tali does not survive the events, her role is filled in by quarian admirals Daro'Xen vas Moreh an Shala'Raan vas Tonbay.
More information: Tali'Zorah section.