Betty is black-haired. She wears a cheerleader outfit similar to Veronica, with a grey skirt, grey boots, and dark grey shirt. She is around the same height as her cousin, Veronica.
Betty is, as her cousin describes her, a "gold digger". At times, she can be quite manipulative, but not in a cruel way like Vicky. She especially acts this way in her school whenever she doesn't want to do any work. She even likes to tease her cousin of things she can't do that Betty can. But deep inside, she has a very kind heart. The only reason why she let others do her work for her is because her parents have her clean up the entire house every single day. This pulls up a full tank of misery in her which made her receive her fairy godparent. Betty even has a crush on Timmy and Ivan, but as much as the two like her, their hearts were on Trixie and Veronica and later Tootie and Chloe and she deeply and generously respects that.