Ka'Toni, Quarian outcaste, clubowner, and dominatrix, at your service...if you've got the money to pay her. It's rare that she gives a freebie, but hey, if you catch her a good mood....

She has an incredible immune system for a Quarian, due to years and years of careful exposure, paying the right people, tests, and probably some chip implants that help by administering antibodies as needed. Also constant shots, probably. Totally worth it, when she gets to take off her mask with her special clients.

Her tongue isn't her only piercing by the way....

also I kinda thought, since they're basically glowy aliens, why not have luminescence in their hair?