1. Official Website: The official website for "The Simpsons" provides information about the characters, including their personalities, relationships, and quirks. It also features images and character bios.
2. IMDb: The Internet Movie Database (IMDb) has detailed character profiles for each of the main Simpsons characters. These profiles include biographies, voice actors, and lists of episodes in which the characters appear.
3. Wikipedia: The Simpsons Wiki is a comprehensive fan-edited encyclopedia that provides detailed information and trivia about the characters, their relationships, and their storylines.
4. The Simpsons Archive: The Simpsons Archive is an extensive online resource with detailed information on episodes, characters, and quotes from the show. It also features galleries of character images.
5. Unofficial Fan Sites: There are numerous unofficial fan sites dedicated to The Simpsons, many of which provide character profiles and discussions about the characters' personalities and development over the course of the show.
6. TV Guides and Listings: TV guides and listings often include brief descriptions of episodes, which may mention specific characters and their involvement in the storylines.
7. Merchandising: The Simpsons merchandise, such as toys, books, and apparel, often features the main characters and may provide additional information about them.
8. Fan Forums and Discussions: Online fan forums and discussion boards about The Simpsons often delve into character analysis and discussions about their roles in the show.