Astrid

Astrid was a witch in the Warren line.

The Charmed Ones used Astrid's name in a spell to call upon the power of their ancestors, which they used to vanquish several of the most powerful demons.


 * "Prudence, Penelope, Patricia, Melinda
 * Astrid, Helena, Laura and Grace.
 * Halliwell witches stand strong besides us,
 * Vanquish this evil from time and space."

It successfully defeated the Source, and later the Source as it inhabited Cole. It was unsuccessful however in vanquishing Barbas. ("Charmed and Dangerous", "Long Live the Queen", "Sympathy for the Demon")


 * Astrid's last name is unknown, though it probably isn't in fact Halliwell based on that being Allen's name Penny took.

Apocrypha
In "The Warren Witches", her full name is "Astrid Warren-Wentworth" and is mentioned briefly.