Tsiriio was a gray, not-very-smart wildcat in Hollyfire's Tale. He was journeying around Mossflower Woods about the time of Lord Stonepaw of Salamandastron's rule, searching for the Land of Ice and Snow. One morning, after traveling a bit, he came across a pile of stones. Mystified, Tsiriio built a little of a town, and, pleased with his work, he continued a bit more until the city of Kitalpha was nearly complete. Satisfied, the wildcat named it "Syriio", because he could not spell his own name. Traveling north, the wildcat finally found the end of his journey, but was found slain the next evening.
Later, the squirrel Thyio finished Tsiriio's work, and renamed the city "Kitalpha".