Sylvia is the charming little sister of main character Caius Erastos. Despite only seeming to be a young child, she is actually quite mature for her age, and usually always has something to say.  She is a middle school student and a proud Meridian Scout, which is kind of like being a girl scout. She usually spends her time boosting environmental programs and planting gardens when she isn't playing the Viola in orchestra. She's an adventurous girl who isn't afraid to speak her mind, and she is very stubborn about how she thinks.

Sylvia is about 5'2" with deep black hair often pulled into two braids. She is pale and has deep blue eyes like her brother. Unlike Caius, she dresses like she's always ready to go outside, meaning shorts, t-shirt, headband and tons of bracelets! Her aesthetic is very floral and fun.

Sylvia has a higher pitched voice, like a pre-teen, that's a little bit spunky and fun.