Ellia

Ellia was a female Wraith raised by Zaddik. When her cruiser crashed on a planet, she and one other Wraith were the only survivors. She was found by Zaddik, who took her as her own child. For a time, she eat food normally, and was able to survive. However, she soon began to crave the lifeforce of humans. Zaddik began to work on a serum to help Ellia, allowing her to feed on him for as long as it took. Eventually, she just lied about the serum working, going out to feed when the male Wraith did. When Atlantis 1 came to the planet, and revealed that Carson Beckett was working on the Iratus bug retrovirus, she took some. However, the result was far from the intended result&mdash;instead of repressing the Iratus bug DNA in her, it suppressed the Human DNA in her. Acting on pure instinct, Ellia mortally wounded Zaddik, killed the male Warith, and wounded John Sheppard, who was forced to kill her.