Lya is a female Nox.
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Later, Dr. Daniel Jackson asked her to come help the Tollan refugees to relocate off Earth. She and the rest of the Nox then helped them get to their new homeworld, Tollana. At that moment she became a close friend of SG-1. (SG1: "Enigma")
When the Tollans held a Triad to determine who had predominance, Skaara or Klorel, she was selected to be the neutral Archon and eventually voted in favor of Skaara. Teal'c suspected that the Goa'uld would try to cheat, so he asked Lya to conceal one of the Tollans' ion cannons. She only cloaked the weapon, but she didn't fire it: she didn't cross the pacifist line. Pacifism doesn't mean ignoring violence in relation to friends and other innocent people. (SG1: "Pretense")
- Lya is the only Nox who appeared in more than one episode, and so far the only Nox to visit Earth.