Wikipedia
Tali'Zorah is a fictional character of the quarian alien race in BioWare's Mass Effect franchise, who serves as a party member (or "squadmate") in all three games in the Mass Effect trilogy. Within the series, she is a skilled technician and the daughter of Rael'Zorah, a member of the quarian judicial review Admiralty Board. Ash "Liz" Sroka voices Tali in each of her appearances. Outside of the trilogy, Tali appears in Mass Effect: Homeworlds, a comic series with individual issues on each of several Mass Effect 3 squadmates.
Tali was initially the only quarian in the series. In the sequels, more extreme variations of her design were discarded in favor of revisions on her previous look. The Mass Effect 3 development team considered her removal from the squad, but ultimately chose to include her due to staff interest. The team also debated whether to reveal her masked face.
Tali has been received positively, with placements on several "top character" lists, and is one of the more popular characters in the series. Her unveiled face was a popular online discussion topic, and was criticized after its reveal for its stock photo origins. Various merchandise for the character, as with other of the series' squadmates, has been released.