Mistystar was about 15 years and 9 months old when she died, based on a commonly cited estimate of approximately 189 moons. The books do not establish an official exact age.
How old was Mistystar?
A community-maintained character reference lists Mistystar’s age at death as approximately 189 moons, or 15.75 years—about 15 years and 9 months. Mistystar’s character reference presents this as an estimate, not a precise age confirmed in the books.
Why is her age only an estimate?
The Warriors series has no established dating system, and the dates used in its fan-maintained timeline are editorial rather than official. That makes it difficult to treat a character-age calculation as an exact canonical figure. The Warriors Wiki timeline explains this limitation.
What does Mistystar’s Omen confirm?
The official Warriors description says the novella follows Mistystar’s first days as RiverClan leader after Leopardstar loses her ninth life. It provides context for Mistystar’s leadership, but does not state her age at death. The official description of Mistystar’s Omen is therefore background, not confirmation of the 189-moon estimate.
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