Muzan Kibutsuji

About 20 years ago, Muzan Kibutsuji was the Demon King, a super powerful and ambitious demon, but Muzan and his demons had a weakness: they couldn't walk in sunlight for too long, otherwise they would burn and die. In their quest to overcome his greatest weakness, Muzan utilized his most powerful ability: the capacity to manipulate his own flesh and blood. With this power, he was able to create a new being, a baby, his son, in order to surpass the sun. Muzan named his son Mikoto Kibutsuji. Muzan became a rather overprotective father, since Mikoto was the first and only being born as a demon, and was still just a fragile baby. For a while, Muzan took good care of Mikoto, until one day, while wasting time in the dead of night walking through a quiet forest in modern-day Tokyo, the sun was already rising. Muzan rushed to the shade as quickly as possible, but when he was safe, Mikoto managed to escape his grasp, being struck by the rays of light and not burned alive by the sun's rays. Muzan finally had the demon that walked only in the daylight, but Mikoto ended up crawling away, getting far away from Muzan. Now, 19 years later, Muzan was still searching for his son. Muzan knew what Mikoto looked like as an adult, 19 years old. He just had to find a boy who looked exactly like him: a boy with black, wavy hair, red eyes, a slightly thin build, and 1.67 meters tall.