Ken Takakura (高たか 倉くら 健けん , Takakura Ken?), also known as Okarun (オカルン, Okarun?), is the main male protagonist of the manga series Dandadan.

He is an occult fanatic, mainly a believer in aliens and UFOS, who was living an introverted school life until he met Momo Ayase from school. After a bet with her leads to them forming a friendship and having his kintama missing from being cursed by the Turbo Granny, Okarun makes it his mission to find what he has lost with help from Momo and other allies as they overcome any paranormal obstacles along the way.

Okarun is a teenager of short height and slender build with brown hair (black hair in the anime), brown eyes and he wears round-frame glasses. Originally, Okarun's hair was fashioned in a bowl cut, but it has since become unruly after his confrontation with the Flatwoods Monster. Though he was initially very skinny, Okarun has gained toned muscles as a result of his dedication to strength training and the numerous battles he faced dealing with spirits and aliens.

While he is one of the few characters that can be seen wearing a variety of outfits, his most common attire is his school uniform, which is a typical gakuran outfit.

Okarun is a self-described socially awkward individual who has a consuming interest for the paranormal with his main focus being the existence of aliens and cryptids. This interest goes all the way back to his childhood where he tried to make contact with aliens in a desperate attempt to make friends, having grown up without a single one in his life due to constant bullying. As a result, Okarun developed an inferiority complex where he believes that he is incapable of fitting in with others or that people are better off not associating with him. Even after making friends with Momo Ayase, Okarun still seems to retain some low self-esteem.