Hiko, also known as Kibitsu Hiko no Mikoto, was the first Peach Boy, a title bestowed upon those born from peaches and granted unique powers to combat oni. He was master to a talking dog called Dog and the adoptive father and mentor to Mikoto Kibitsu.

He cut a striking figure, tall and handsome with short dark hair and black eyes. His attire was a simple grey kimono, and he carried an old katana, a gift from his father.

As the original Peach Boy, Hiko devoted his existence to the destruction of oni, a quest that once took him to Oni Island where he cut down countless demons. His life changed when he found a young Mikoto, a half-human, half-oni child shunned and hunted by both races. Hiko adopted the boy, raised him as his son, and trained him in the art of demon slaying, forming a powerful bond between them.

Hiko met his end in a battle against a formidable judge oni named Nobrega. Though a skilled warrior, he was bested and slain by the creature. With his final breath, Hiko entrusted his iconic katana to Mikoto, urging him to find his own way and carry on the mission against the oni. This death became the driving force behind Mikoto's profound hatred for oni, compelling him to remove his own oni horn and fully commit to his destiny as the next Peach Boy.