Sullivan Ferris is a three-year-old boy in Supersized Family and a few of Discofurby's stories.
He is average sized, with fair skin, messy brown hair and brown eyes. He has no pants. He is seen wearing a red cape, a navy blue T-shirt with a sky blue lightning bolt on it, a diaper and brown cowboy boots.
In the stories, he fits many roles, but in the game, he can do any of these things.
- Play with a toy firetruck.
- Get sick (the medicine cures him)
- Cry (he gets cheered up easily)
- Cut himself on his finger (when he does this he holds it up and screams)
- Wet or dirty his diaper.
And either he, Duncan or Virginia rides a red tricycle as one is visible in the garden.
He is a bit of a klutz, but that is expected at his age. He likes playing with dolls, trucks and blocks, and possibly riding tricycles. He has two cries: a squinted, screaming cry that he does when he's hurt and the family's silent frowning cry when he's sad.
- Rose Ferris-mother.
- Silas Ferris-father.
- Daniel Thump-friend.
- Mayzie Wheeler-good friend.
- Rachel Murphy-friend.
- Torri Ferris-older sister.
- Christian Ferris-older brother.
- Duncan Ferris-older brother.
- Virginia Ferris-younger sister.
- Jessica Ferris-baby sister.
- Jonathan Ferris-baby brother.
- Mary Taylor-friend.
- Billy Wells-friend
- Elliot Peters-friend.