Ken Shinozuka

Ken Shinozuka is the older brother of the story's heroine, Aoi Shinozuka, and plays a prominent role as the head of a school delinquent group. He earned the widely recognized nickname 'Franken' due to the screws he wears on his ears. Despite his intimidating appearance and formidable fighting ability, his true nature is remarkably simple and pure—he is fiercely protective of those beneath him and leads a disciplined lifestyle. In the story, he confronts the protagonist Ranmaru after mistakenly believing he had harmed one of his underlings, showcasing his deeply protective instincts. He is a key supporting character brimming with vitality and beloved by those around him.