Nigel Hicks is Matilda's other best friend other than lavender. He's in Miss Honey's class. Nigel's dad is a doctor and Dr. Hicks's wife helps their son study every night. Nigel is a smart young man. He hates Miss Trunchbull. He is super important. in the musical he explains what a "chokey" is. Miss Trunchbull hurts Nigel's feelings when she gets smart with him. Nigel isn't seen or mentioned in the movie. Which is a shame because he is a really funny and important character.
But he appears in Matilda returns to film, the book, and Matilda the musical.