(She was friends with 'Bimby' for a short while). She is friends with Butch Hilburg, Rupe the Fang, Snarler McMurtagh and The Sundance Pup. The company's dogs usually run away from their owners and back to the Yellow Cat with a map containing information about where the money and jewels were.

She runs a company with Clive, a talking parrot. The Yellow Cat is the main antagonist of the story. Mr Munroe lived with Ottoline since she was a baby and they were best friends ever since. He was given a coat and a pair of sunglasses by Ottoline's parents. Mr Munroe was found by Ottoline's parents in Norway and taken in. He draws a map of Apartment 243, for Ottoline to catch the Yellow Cat while trying to steal the money from Ottoline's apartment. In the book, he disguises himself as a dog named Bimby Bottlenose II, Emperor of Heligoland, Pedigree Norwegian Lapdog (to which they called him Nosey). It is also hinted that Mr Munroe also has a diploma from Who R U. He is a little creature with long, straight hair that Ottoline likes to brush. Mr Munroe is Ottoline's friend and is from a bog in Norway. She usually changes her hairstyle and is cared for by McBean's Cleaning Service, The Smiling Dragon Clothes-Folding Co, Marion's Bathroom Supplies, The Home-Cooked Meal Co, Smith & Smith Pillow-Plumping And Curtain Drawing Technicians, The 1000-Strong Lightbulb-Changing Co and The Door-Handle Shiners Inc. Ottoline has a diploma in disguising from a school named Who R U. She is also interested in solving mysteries and keeping collections (like her Odd Shoe Collection and her Postcard Collection). She likes writing in her notebook and splashing in puddles.

It is hinted that Ottoline's parents were coming back from their trips to see her. Ottoline's parents go on trips to other countries, leaving Mr Munroe to care for her.

She lives in Pepperpot Building in Apartment 243 with a creature named Mr Munroe. Ottoline Brown is the main protagonist of the Ottoline series. It was also shortlisted for the Kate Greenaway Medal and nominated for the Carnegie Medal. It won the Nestlé Children's Book Prize Gold Award and the Red House Children's Book Award for Younger Readers. Ottoline and the Yellow Cat is a children's book by Chris Riddell, published in 2007.

Ottoline yellow cat