Sasha was the "mother" of Kate, Tanya and Irina, who together with Carmen and Eleazar form the "vegetarian" Denali coven, who reside in Alaska.
Sasha was involved in the Immortal Children phase, where vampires changed young children or infants into vampires. They were really beautiful, however, since they were so young they could not control themselves. The Volturi saw this as a threat to the vampire's secrecy, and banned all Immortal Children.
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