"Sandstorm had a quick temper and a strong sense of what was right, which Firestar respected. Next to his deputies and medicine cats, Sandstorm was the cat Firestar consulted most often before making any decisions for the Clan."—Narrator in The Ultimate Guide, page 19
Sandpaw became an apprentice. Her mentor was Whitestorm, Her friend being Dustpaw. After Firepaw joined the group, it became clear she didn't like him. Graypaw and Ravenpaw became friends with Firepaw, but Sandpaw and Dustpaw kept on picking on him, calling him names like kittypet, and other insulting things.
And even though she and Dustpaw had been warriors before them, it was Firepaw and Graypaw who became warriors first, Making her and Dustpaw upset. During a border fight, Fireheart saved her from falling off of a cliff. At first she was annoyed, thinking she didn't have to be saved, but then after Whiteclaw fell and died, she realized what danger she was in. She started being less mean. When Fireheart was made a warrior, he helped her finish her apprentice training. He did this by telling Bluestar that if she and Dustpaw fought in the battle, they would have gotten their names too.
Finally, Sandpaw was given her warrior name Sandstorm. She and Fireheart became friends. She soon started to like Fireheart, but he didn't notice right away. After Fireheart became deputy, did he finally understand. She was a bit jealous of Cinderpelt, since Fireheart went to her for help instead of talking to her. She got over this and became Fireheart's mate.
Tigerstar killed her mother, Brindleface, to give the dog pack a taste for cat blood. Making her half-brother and half-sister, Ashfur and Ferncloud, very upset. After the fight with BloodClan, Sandstorm sat with Firestar and Graystripe and watched the sun rise.
Then she and Firestar had two kits together, Squirrelflight and Leafpool, Leafpool grew up to be a medicine cat, and she had three kits, Hollyleaf, Lionblaze and Jayfeather, her apprentice. Squirrelflight had four kits, Sparkpelt, Alderheart, Dandelionkit, Juniperkit.
During the Great Battle, Spottedleaf dies a second time so Sandstorm can still be alive.
Sandstorm later retires to the elders' den. In The Apprentice's Quest, she dies of infected wounds.