Donny has two siblings -- Devon and Katie.
They are pretty much inseparable -- and not very interested in spending any time with Donny. Katie is embarrassed by Donny, and Devon just pushes him around. They are your average overemotional goth-in-a-box duo, bearing the burden of the entire world on their dainty shoulders. They enjoy spewing petty complaints while indulging in teenage vampire movies and terrible music.
Devon and Katie both manage to find ways to benefit from Donny's condition, usually using it as a way to gather sympathy. For instance, Katie will tell her teachers that she was too busy "caring for her younger brother" to complete a project, while Devon will use the Caring-Older-Brother act to attract the ladies. Devon and Katie are people that you and I know -- despicable, spoiled brats who are completely unaware of the world outside of their egos.
