|First Appearance||Trapper Keeper|
Billy Harris, sometimes called Carlos by his peers, is a terminally ill kindergartner. He is always coughing up his lung and needs to be at the hospital quite often. When he's not at the hospital recovering, he enjoys hanging out with Filmore Anderson and the other kindergarteners. He likes watching movies and Pewdiepie on his iPad with his friends, including Ike.
His mother appears alongside him when he casts his vote for Class President at school.
- Trapper Keeper (s04e13)
- Proper Condom Use (s05e07)
- #REHASH (s18e09)
- #HappyHolograms (s18e10)
- The End of Serialization As We Know It (s20e10; referenced)
Billy can be met with Filmore Anderson, Flora, Sally Bands, Quaid and Jenny at the playground and will offer to play a game of hide-and-seek with the player. He can eventually be found hiding by Bill Denkins' farm.