Jun Hiiragi is Keiichi Hiiragi's younger brother. He is a 9th grader and is in the same grade as Uta Yumeno, Miki, Mana, & Kakeru Kogure. He is Kuromi's source for the Dark Power, giving recharges with his guitar. He has a crush on Uta. He always makes jokes and puns. He is great friends with Kakeru. Jun, overshadowed by Keiichi, has hatred for him. Keiichi remains indifferent. He taunts his brother. He’s kind-hearted, cheerful, & fun! He has messy chin-length dark magenta hair with a blue streak & gray eyes. his hair used to be blue, like his brother. He usually wears wild, punk, emo outfits.