Sister Cat
The Sister Cat in the Hat is a young kitten. She wears a pink tie and a flat pink and white hat with a flower on top. She gets a bit carried away imagining a Glunk that cost her family a fortune with a long-distance phone call to his mother. She learns a valuable lesson after Young Cat in the Hat helps her unthunk him.
Due to her resemblance to The Cat in the Hat, she is known as the daughter kitten. Young Cat is her older brother, and her great-great-great-great-grandfather is King Looie Katz.
She appears in the book I Can Lick 30 Tigers Today! and Other Stories.