Ansha was a member of Species 571 from the Delta Quadrant.

Ansha and her marriage partner Dornar had one son, P'Chan, who cared for them. Ansha and Dornar were killed in a Borg attack, while P'Chan was assimilated. (VOY: "Survival Instinct")

This character was only mentioned in dialogue.
According to the Star Trek Encyclopedia (4th ed., vol. 1, p. 30), Ansha and her family were on their homeworld when the Borg attacked.