Sandstorm is a pale ginger she-cat with barely visible stripes of darker fur, and leaf-green eyes.

Sandstorm was a ThunderClan elder who served as a warrior under Bluestar's, Firestar's, and Bramblestar's leaderships in the forest and lake territories. She was born as Sandkit and was later apprenticed as Sandpaw to Whitestorm. She constantly teased the newcomer, Firepaw, a former kittypet, and after Fireheart saved her life, Sandpaw grew to respect him. After becoming a warrior, Sandstorm grew closer to Fireheart and mentored Sorreltail. Eventually, Firestar became her mate, and together, they journeyed to rebuild SkyClan, where she was their unofficial medicine cat. Afterwards, she had two kits, Squirrelkit and Leafkit, and mentored Honeyfern at the lake.