Sandstorm

Spoiler warning: Plot and/or ending details follow.
"It wasn't your fault. It was my time to go. I sensed when I decided to go with you to search for SkyClan that I might not survive the journey. You know, I never wanted to spend my last days as an elder, sitting around in camp. I wanted to die doing something important...and your quest gave me the chance to relive a special memory with Firestar." ?? Sandstorm reassuring Alderpaw after her death in The Apprentice's Quest, page 260

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.

https://warriors.fandom.com/wiki/Sandstorm