Karen was born on a spring Saturday afternoon at 2:35 p.m. Watson picked her name which means "pure" because he felt pure joy in seeing his daughter.
Karen describes her & Andrew as "two-two" (that she got a book called "Jacob Two-Two Meets the Hooded Fang") because they split their time between the "little house" (which is their mom's house) and the "big house" (which is their dad's house).
Karen and Andrew tend to have two of most things since they spend a lot of time at each of their parents' house.
When she began kindergarten, she was put in the first grade during Christmas. After spending a week in first grade, Karen's teachers decided to move her to the second grade.
Karen takes her spelling seriously and is protective of her little brother.
She believes her neighbor Mrs. Porter (or Morbidda Destiny) is a witch.
She thinks that the attic in the Brewers' house is haunted by the ghost of Ben Brewer.
Karen has to wear earplugs when she goes swimming. She likes to help out in the kitchen.
Karen attended Camp Mohawk one summer and even attended a circus camp with her friends.
Karen can sometimes be bossy and loves to be the leader.
Karen is described as having blonde hair, blue eyes, freckles and wears glasses (she has blue glasses for reading & pink glasses for everything else).
Karen is fearless with a wild imagination which can sometimes get out of hand.
Karen met Hannie on her first day of preschool and she met Nancy after her parents' divorce & she moved into the "little house" with her mother & brother.
She used to be friends with Amanda Delaney until the Delaney family moved away to another neighborhood.
After the Kormans moved into the Delaney's old house, Karen becomes close friends with Melody Korman. She is also friends with Shannon Kilbourne's younger sister Maria Kilbourne and Mallory Pike's sister Margo Pike.
Karen has a pretend husband named Ricky Torres who sits next to her in class because he also wears glasses.
Karen has pets who live in the "big house" and the "little house."
Karen has a rat named Emily Junior who travels with her between her two houses.
Karen found a cat named Growly in her shed & adopted it.
Her stepbrother David Michael has a Bernese mountain dog puppy named Shannon.
Karen used to have a goldfish named Crystal Light, but it passed away while she was at her mom's house.
Watson adopted a pony named Blueberry for Karen after visiting an estate sale.
Karen has two stuffed cats named Moosie and Goosie (who look exactly the same). Goosie stays at the "little house" and Moosie stays at the "big house."
After Seth accepted a job in Chicago, Goosie moves with Karen to her stepdad's house.
She has a blanket named Tickly that she ripped in half to keep one piece at her mother and father's house.
Karen has been the hospital twice: when she broke her wrist while roller-skating and when she got her spleen removed after falling from her tree house.
She also had the chicken pox.