A small, pale ginger tabby she-cat with ears curled like crescents and green eyes. A member of ThunderClan, she was born to Thriftyear and Bayshine but passed away within a month due to her frail health. Unable to join StarClan, she wanders the living world, consumed by jealousy and obsession toward her older sister, Guest. She stalks her and interferes with her training, gradually transforming into a sinister, wraith-like entity. In short, Morningkit follows Guest as a ghost, making eerie noises and attempting to drive a wedge between Guest and Goldenpaw.

A sturdy, well-built tom belonging to ThunderClan. He is an apprentice with bright, shining golden tabby fur and clear light-green eyes. He is the only cat who knows that Guest has been tormented by Morningkit for a long time. He has feelings for Guest.

The father and mother of Morningkit and Guest. Thriftyear is the mother, and Bayshine is the father.