Elizabeth Brisby is a mouse who is a major protagonist in The 100 Acre Wood film series. She also re-appeared in Hidden Chronicles as a recurring character. She became Fievel's adoptive mother after his parents were murdered by his arch-enemy, Cat R. Waul.
- Other Names - Bris, Mrs. Brisby, Elizabeth Jennifer Brisby, Liz, Princess Elizabeth Brisby, Queen Elizabeth Brisby
- Personality - motherly, caring, determined, kind, beautiful, sweet
- Goal - To save her son Timmy from the plow (Film). To be with the ones she loved (Hidden Chronicles). To adopt Fievel after saving him from Cat R. Waul (Mrs. Brisby Meets Fievel)
- Home - The Lee of the Stone; Thorn Valley
- Friends - Jeremy, Justin, The Great Owl, Nicodemus, Auntie Shrew, Winnie the Pooh, Simba, Woody, Buzz Lightyear, Fievel Mousekewitz (adopted son), Cholena, Genie, Abu, Iago, Tanya Mousekewitz (adopted daughter), Yasha Mousekewitz (adopted daughter), Snow White, Cinderella, Alice, Aurora, Eilonwy, Ariel, Belle, Jasmine, Pocahontas, Megara, Mulan, Tiana, Rapunzel, Anna, Elsa the Snow Queen, Odette, Anastasia, Aisling, Mewtwo, Good Fairy, Basil, Dawson, The Furlings, Dumbo, Timothy Q Mouse (older brother), Tom, Jerry, Mewsette, Jaune Tom, Danny, Sawyer, Edmond, Casey Jr., Tillie, Toby the Dog. Bernard (father). Bianca (mother)
- Enemies - Jenner, Cat R. Waul, Cat Gangsters, Peg Leg Pete, Dragon the Cat, The Fitzgibbons, Ratigan, Chernabog, Shere Khan, Scar, Zira, Firebird, Lotso, Sullivan (formely), NIMH, Mouse Queen, Kahmunrah
- Likes - her children, being safe, adventure, Fievel
- Dislikes - danger, predators, flying (sometimes)
- Weapons - The Red Stone Amulet
- Fate - she moved her family away to the protected side of the forest (Secret of Nimh). Gets a job at Thorn Valley (Fantasia in the 100 Acre Wood). Adopts Fievel, Tanya and Yasha and they live happily ever after (Mrs. Brisby Meets Fievel).
- Quote - "Oh, that's too bad, but don't you worry, I'll be your new mother now, and I'll adopt you as a new member of my family."