George Kobayashi (小林ジョージ Kobayashi Jōji) or (小林乗児 Kobayashi Jōji) is Sashi's younger brother. Though he briefly appeared in a flashback in "Baby-Pocalypse", he has yet to make an appearance in the present.
George is a member of the Horticulture team and made Greenest Thumb, according to Sashi in "Flurgle Burgle". Though Sashi mentions him without saying his name, co-creator Sam Levine confirmed she was talking about George.
George's parents allowed Sashi to babysit him when he was younger.