Tryan

Tryan was a Talthun engineer on the Stromos during its trip to Ardena before it crashed. When the ship's systems began to fail, he was one of the twelve minds that were transferred into the body of Daniel Jackson in an attempt to preserve the minds of the Talthuns whose bodies had died, but the transfer process was unstable, causing the various personalities in Daniel to randomly shift control. While trying to determine what had happened to Daniel, Doctor Janet Frasier was eventually able to learn about the systems responsible for the transference from Tryan, who, although shaken at the knowledge that his body was almost certainly dead, appeared willing to help them. Although he lost control again during the conversation with Janet, he was later able to assert himself once again, reflecting that he appeared to have a greater pain threshold than the other personalities.

Tryan presumably died when his mind was transferred out of Daniel's body ("Lifeboat").