- For additional uses of "Seifer", see: Seifer.
Sometime between 2375 and 2377, Lex met James Gotens, who had convinced her to exchange her own Seifer symbiont with the opposite universe counterpart of his own symbiont. The notion was that they would become closer in this way.
Using a specifically created holographic program aboard the Phoenix-X, the two captured Commander Night Gotens and operated on both he and Lex. The result was an exchanging of symbionts. ("Secret Shuttles, Part II", "Secret Occurrences")
Lex continued to be at James' right side for most of his scheming and was part of his crew when he acquired his own starship. In 2382, she took part in going back into the primary universe and hijacking the USS Phoenix-X for the Klingon-Cardassian Alliance. Unfortunately, their plans were thwarted by the crew and the sentience of her previous symbiont, and she was handed over, as a prisoner, to the Terran Rebellion. ("Mirrorlyness!")
- It is quite possible that Lex's joining somehow poisoned the symbionts she joined with to the point of the symbionts becoming slaves to her will. That would explain the Gotens' symbiont easy and sickly turning to partner with his mirror double within James. It is also an explanation to Commander Seifer's evil characteristics, as explained in later episodes.
|The hosts of Seifer|
|Lex | Night | Oroku|
|The hosts of Gotens|
|Unknown • Elena • Laumar • Rivera • Night• Lex|
|Mirror universe: Night • James|