Jeffy-François, a puppet, commonly known as Jeffy, is one of the main characters of SuperMarioLogan, a YouTube channel with more than 7.8 million subscribers. Jeffy became very popular from the day of his debut on Mario The Babysitter in January 2016. He is the adopted son of Mario and Rosalina. His biological parents are Jacques Pierre François and Nancy.
Jeffy has an unusual personality. He wears a yellow t-shirt and a blue helmet, a yellow pencil in his nose, and a diaper outside of his blue jeans. He wears the diaper outside of his pants because he doesn’t want his diaper to be dirty. He has blue eyes and dark brown hair.
Jeffy has both positive and negative fanbase. He is a pretty popular character among the kids. But most of the older viewers don’t like him because of his stupid behavior and the negative impact on teenagers.