Born to single mother Sydney, in the sequoia forest bordering the Ankyra Sound, Astera was the smallest of her litter. Two of her siblings died within a week of life, leaving Astera and Ravin as the only survivors of the litter. When she was less than a month old, her mother disappeared.

Taken into a neighboring pack, Sapphique, along with her littermate, she quickly found her place in the ocean pack.

Months later, she is swept away by a wave, while looking for her missing sister-cousin, Sobeille. With the aid of Caiaphas's spirit, she finds her friend, and the two reunite with their pack.