The two main characters are Clifford, a really big red dog, and the human who is his owner. Clifford is special because of his size and his kind nature. His owner is important as they are the one who shares a bond with Clifford. There may be other minor characters like neighbors or other animals in the area, but Clifford and his owner are the main focus of the story.
Well, Clifford the Big Red Dog is mainly about the daily life and exciting experiences of this big, lovable dog. He gets into all sorts of mischief and has many memorable outings with the people around him. The story emphasizes friendship, kindness, and having fun.
Emily Elizabeth is also very popular. Since she's Clifford's owner, many fanfictions explore their special bond. It could be about how she takes care of Clifford, or how they face challenges together as a team.
The main character is obviously Clifford, the big red dog. His owner is also an important character. And Clifford's animal friends like the other dogs in the neighborhood are main characters too.