Hiyama Kiyoteru is a male Vocaloid who's secretly integrated himself into society after being manifested into reality by the feelings and love of his fans. He was raised by a catholic priest named Kiyoshi, who adopted him. He is 22 years old and stands at 5'9. He has brown hair, grey eyes, and wears glasses. He and his friend Akito started a band called ICE MOUNTAIN (Consisting of Kiyoteru (vocals) and his friends Akito (guitar), Natsuki (drums), Haruto (keyboard), and Tohma (bass)) in junior high, but temporarily stopped in year 4 of college, after which he graduated and became a primary school teacher. One year later, the band resumed activity, and has been ongoing ever since. He and the band perform on weekends, and his stage name is "Ice Mountain Teru", or just "Teru" for short. Additionally, he's quite good at math. Kiyoteru has a unique quirk: Although he's described as a good-natured, a bit shy and friendly individual with a bit of a father complex, he assumes a more daring and cool personality when he removes his glasses, which he does for performances with ICE MOUNTAIN to really channel his inner Ice Mountain Teru persona. A complete 180 from his usual personality to where it's almost comical. He becomes outgoing, charming, and confident.