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"Firetail. I think the best mate for you is the mate you want to change yourself for."
Bluestar is a medium-sized molly-cat with pale blue eyes, sunken into the sockets with age, a longer, tapering muzzle, a light pink nose and ear pink. Her paw pads are hard and dark gray in which to navigate through thick foliage, like every ThunderClan cat, and a long, curving tail.
Bluestar was a leader of ThunderClan who had, in the past, served under Pinestar and Sunstar's leaderships in the forest territories. She was born as Bluekit to Moonflower and Stormtail, alongside her sister, Snowkit. Bluepaw became an apprentice and was mentored under Stonepelt, though her training was pushed back by Stonepelt's healing process of his injury, after Moonflower's death, Bluepaw became jealous of her sister, Snowfur, and had been broken by grief, who had already become a warrior, but it switched when Bluefur was made a warrior. Snowfur became envious of Bluefur and the vision Goosefeather had received about her and Snowfur assumed she wasn't special. Bluefur and Snowfur grew out of their differences and remained close until Snowfur fell in love with Thistleclaw, a warrior Bluefur was skeptical of since kithood. Before Bluefur could warn her sister of Thistleclaw, Snowfur had his kit, Whitekit. Snowfur died on the Thunderpath two moons after, and Bluefur grieved for her sister deeply and promised to raise Whitekit as much as she could. Bluefur later became more independent as Whitestorm was made a warrior, she had spare time to talk with her friend from RiverClan, Oakheart, but little did she know what it would escalate to. Later in those moons, they began to fall in love with each other, Oakheart and Bluefur realized they were having kits soon after. They agreed to having the kits go to RiverClan soon after they were born. Bluefur gave birth to her kits, Mistykit, Stonekit, and Mosskit. All lived, but Mosskit endured severe frostbite that Bluefur forced herself to neglect. Oakheart brought them to RiverClan and Sunstar made Bluefur his deputy, moons later, Bluefur became Bluestar and her medicine cat, Spottedleaf, foresaw a prophecy of her deputy, Redtail's, kit, either Sandkit or Firekit, to be a good danger to the Clans. Bluestar didn't understand at first but realized that Firetail was a revenge-driven cat who had been flung into goodness by his pure heart. Bluestar fell into a depression after her latest deputy, Tigerclaw, admitted to killing Redtail. In the hearing of Snowkit being missing, reminiscing on Mosskit, Bluestar, though still depressed, made her way into RiverClan territory, where Graypool lay dead, and Bluestar knew she was next, she died at the claws of her worst enemy's apprentice and entered StarClan, guiding Firetail through his mission to defeat Tigerstar.