Sylvia is a confident woman in her older years. She is typically soft-spoken, but out going and friendly. She is not afraid to be honest about things to the point that she openly embarrasses her daughter, Felicia. Sylvia claims to have a soft spot for the weird ones, like Hop Pop, and it shows in her own weird ways. She likes to act up, most likely as a way to show that their is still a lot of spark in her spirit. However, she does display a lot of insight and understanding as well, such as when she knew that Sprig was feeling left out of their fishing trip and told Hop Pop to be with his grandson when he was spending more time with her.
Sylvia is a skinny light green frog with a pale yellow underbelly. Like the other frogs, she has four fingers and two toes on both her hands and feet respectively. She has grey hair that is pulled back into a long ponytail. She has light pink lipstick on and pink circles on her cheeks. Her eyes however are two tiny black dots and wears a pair of light blue glasses with pointed tips at the end.
In "Hop Pop and Lock", she wore a plain pink dress with a flower on the top while in "Family Fishing Trip" she wore white sun pants a yellow shirt and a cyan neckerchief. Her hair was also pulled up into a bun at the top.
- While she playfully teased both Hop Pop and Monroe, it is obvious that she preferred Hop Pop for being "weird".
- Besides Anne, Sylvia is also considered part of the Plantar Family despite not being directly related.