Kim possible is a cartoon character that defied conventions and became one of Disney's first original series. Despite initially being criticized, it became one of the channel's most popular shows.
She is a high school student and freelance hero who is respected by various military, law enforcement, and government agencies. She is not a misunderstood outsider like some other hero shows, and she's on good terms with her friends and peers in school.
The show focuses on her ability to balance her high school life and her career as a superhero/vigilante. Her missions involve rescuing other children and fighting villains. She often comes across as a competitive, image-conscious, and ambitious teenager who wants to succeed.
Ron Stoppable is her best friend and partner-in-crime, who provides a balance to Kim's image-driven personality. He encourages her to slow down, see the bigger picture, and not be so hard on herself. He also is more relaxed and flexible, and is able to handle situations that may otherwise prove too much for her.
In addition, Ron also provides a lot of humor to the series. He is a good listener and has a positive outlook on life, which allows him to provide a much needed balance for Kim's often overly competitive attitude towards her work.
In a way, Ron is like a mentor to Kim. He helps her with her mission by reminding her of what's important in life, and to keep things in perspective and not get so caught up in the details that she can't do what needs to be done. He also is very loyal to Kim and will always be there for her.