Tinker Bell is a fictional character in J. M. Barrie's play Peter Pan, or The Boy Who Wouldn't Grow Up, and its many adaptations. She is a fairy who is Peter Pan's best friend and sidekick. Tinker Bell is a very small, light fairy with a big personality. She is often jealous of Peter's attention to other fairies, especially Wendy Darling. However, she is also fiercely loyal to Peter and will do anything to protect him. A fanart Disney sticker with Peter Pan Tinker Bell.