Nannie (real name Janet Taylor) is the maternal grandmother of Charlie, Sam, Kristy & David Michael Thomas, the step-grandmother of Karen & Andrew Brewer and the adoptive maternal grandmother of Emily Michelle Brewer.
Her age is described as in her 70s and she usually wears pants. Nannie is described as energetic and spry. She can be very firm when it comes to discipline.
Nannie used to live in an apartment 45 minutes away from the Thomases' old house, but moved into the Brewer-Thomas house after Emily Michelle was adopted.
When Watson became Mr. Mom after his heart attack, she felt left out and temporarily moved into an apartment in the Waterford Gardens Complex. She moves back home after realizing that she is needed and loved.
In Karen's Wish she broke her hip a couple of weeks before Christmas and developed a staph infection. She spent three weeks in the hospital before being released just in time for the holidays.
In Karen's Mistake she becomes close to a man named Brian English and went on a couple of dates with him. Karen worries that they will get married and move out. Nannie assures her that nothing like that would happen.
After she won the Cocoa Best Chocolate Cook-Off, Nannie began a baking business.
- Bowling (she is a member of a bowling league)
- Sewing and knitting
- A terrific cook
- Her favorite CD is Frank Sinatra
- Her favorite book is "The Mayor of Casterbridge"
- She loves watching the New York Knicks
- Nannie volunteers at the hospital in Kristy and the Sister War and mentioned in Kristy's Big Day.
- She volunteers at the library and the Foodshelf in Kristy and the Missing Child.
- Nannie owns a car called The Pink Clinker. When she bought the car she had it painted pink. It has a pink plastic flower on the antenna and hung a little stuffed koala from the rear view mirror.
- She has an old cedar steamer trunk which contains old letters, pictures and other things she saved over the years.
- She looks good in pink according to Stacey McGill in Claudia's Freind Friend.
- Nannie had a bowling tournament in Claudia and the Great Search.
- She's won trophies for her bowling in Kristy's Mystery Admirer.
- She has a friend named Sophie that moved to Florida in Karen's New Bike.
- She participated in the mother-child softball game that the BSC hosted in Shannon’s Story as the umpire.
- She's golfed a little in Karen's Island Adventure.
- Nannie doesn't like surprises in Karen's Big Top.
- She's been to Chicago in Karen's Big Move.
- She inherited an antique crystal vase that is from her grandmother in Karen's Reindeer.
- Nannie taught Karen how to knit before the events of Karen's Big Sister.
- She doesn't like rats in Snowbound.