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Shimmersky is a stunningly beautiful black she-cat with soft specks of silver and clear, sky-blue eyes. She is kind and respectful, and dreams of being leader someday and serving her Clan to the end of her life.
- She is first seen listening to a story being told by Mousefur about the Ancient Clans, and her sister comments that she wishes she could have been in those Clans. Later, Shimmerkit meets the younger kits, Nightkit and his sister Lightkit. Soon, they all become apprentices, Shimmerpaw apprenticed to the leader Darkstar.
- After training, the four friends become warriors. Shimmersky had had a crush on Pinestorm since she was an apprentice, and asked to be his mate. They are now currently mates.