Tali is a quarian, one of a nomadic alien race driven from their homeworld, Rannoch, by a race of software-based intelligences which they created, the geth. As a quarian, Tali must wear a full-body environmental suit due to her race's weaker immune systems, which also has the effect of hiding her physical appearance and facial features. Tali is first introduced on her Pilgrimage, a quarian rite where young adults leave to obtain a gift for a captain so as to be allowed to join their crew. Having completed this after the first game, her design in Mass Effect 2 and 3 reflects her new maturity. In both Mass Effect 2 and Mass Effect 3, Tali's default appearance can be changed to various alternate outfits; Mass Effect 2 unlocks one outfit by completing her loyalty mission while another requires buying the "Alternate Appearance Pack 2", and Mass Effect 3 offers one alternate from the start and unlocks another by buying the From Ashes DLC.