Character Class is an interactive feature in Family Guy Online. This devotes what your character appearance looks like, what powers and ability you start out with and such. However in Family Guy Online, your character class is a definer as to how you look. Given information we have about the beta, we can confirm that if you are Stewie Class, for instance, it will make your character an infant, as well as give you special abilities to help you assume a modest level of Stewie. But if you are Peter Class, you became an obese adult, who is very strong, and can take multiple hits (your average online game "Tank Class").
NOTE: The Brian Class is locked, due to the current development for the class.