Dracula's most famous sidekick is commonly known as "Renfield." Renfield is a character from Bram Stoker's novel "Dracula," published in 1897. He is a patient in an insane asylum who becomes enthralled by Dracula and serves as his loyal minion. Renfield is known for his obsession with consuming living creatures, particularly insects and later on, rats. His character has appeared in various adaptations of the Dracula story in films, television shows, and other media.