Charlotte wears a white shirt with green shirt sleevings on each ending side, a light blue skirt long socks and green shoes. She has long swirling hair with a purple bow on the side. Her appearance is similar to Milly from Phineas and Ferb. She is taller than A.J., Timmy, Ivan and anyone else in their height, but shorter than Trixie and Veronica.
She is first introduced in the Valentine special, and it's revealed that she is smarter than A.J. In addition, just like Carolyn Lawrence's previous characters, Sandy Cheeks and Cindy Vortex, Charlotte knows karate as well. She has a bit of a spunky attitude, but she knows better than to put her friends in danger for her needs.
Charlotte is a good friend of Tootie, Chloe, Timantha, Veronica, Missy, and sometimes Trixie. Charlotte forms a bit of a rivalry towards Trixie. They share different opinions on beauty and sometimes bet on which opinion is best. However, they are still very good friends aside from their differences.
She and A.J. share a strong love to each other. After meeting her, A.J. was a bit shy to talk to her and he didn't want her to think of him as some loser, but Charlotte can see through it and see's him as a sweet kid. She really considers A.J. very brave after she helped him defeat Vicky and became his girlfriend as long as he doesn't look like a fake again.