Ken Takakura (高倉 健, Takakura Ken) is a shy and friendless high school boy who tries to connect with Momo over their shared interests in the supernatural. Momo and her friends call him "Okarun" (オカルン)—derived from "occult" after his interest in the topic—so that she is not inadvertently reminded of her celebrity crush, though Okarun is oblivious to the origin of this. After being possessed by the Turbo Granny, Okarun gains the ability to enter a powerful demonic state, granting him immense speed but also a suave yet lethargic alternate personality. Okarun has been bullied frequently by his other classmates for his nerdy demeanor, but grows to take solace in his new friends and eventually becomes somewhat popular. Most of all, he values and cares a lot about his friendship with Momo due to her being his first real friend, and after his initial encounter with Taro and Hana, he realizes he is in love with Momo, eventually confessing to her. The loss and recovery of his testicles (kintama) is the main focal point for most of the series.