Thanks BubblegumStripe for the first fact!
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-On page 8 of The Darkest Hour, Fireheart is mistaken as Firestar.

-Since Crookedstar got his injury so young, Vicky thinks he probably didn't have speech problems because he quickly learned how to make do with his jaw.

-Kate said that One Eye loved Star Flower as much as he could love any cat, and he did not kill her mother and littermates.

-When Cinderpelt went to StarClan, her leg was healed.

-Littlecloud never loved Cinderpelt (even when she took care of him) but only looked up to her as an older sister.