Asteria is a pure white she-cat with bright, blue eyes.
Asteria was born to Cloudy and Sky. She had one brother named Falcon, but he died soon after he was born. Cloudy died giving birth to Asteria so Sky raised her by himself. Sky was captured and killed by Squeak and accroding to Asteria: "Sqeak to him into his cave and he never came back out." Persephone and Achilles found her being cornered by Squeak and a few other of his group members. They became Asteria's adoptive parents untill she and Persephone were killed by Squeak.