Matilda Wormwood, also known by her adoptive name Matilda Honey, is the title character of the bestselling 1988 children's novel Matilda by Roald Dahl. She is a highly precocious six and a half year old girl who has a passion for reading books.
Vote which fictional character would naturally fit in-universe with a big-named franchise! No time-travel, no interdimensional crap, no "Pooh's Adventures", they would just exist in-universe.