Cranberrystem is a Su Susann creation but I expanded on her. She's Gorsetail's sister just like Susann said, but she survives to adulthood!
To sum them up, Cranberrystem is the silly sister, Gorsetail is the serious one, and Thistlepaw was the sarcastic one.
Cranberrystem had a crush on Nightcloud when they were apprentices but nothing came of it. Eventually she ends up becoming mates with Downtuft, Crowfeather's older sister instead.
Born: Pre-TNP
First Appeared: uhhh never technically
Mothers: Runningbrook, Tawnyfur
Littermates: Gorsetail, Thistlepaw (Thistletuft)
Mate: Downtuft
Mentor: Whitetail
Apprentice: Thistleheart