Responses
maybe his hair is also black? I really don't know but i saw his hair turned black for a moment when they threw him at the small house or storage something.
In the novel spoilers he reconginezed the child to be his own as he originally had black hair and dyed it grey
Umm,,,I don't think that child's father is the white haired dude,,, cuz the child's hair is black (●￣(ｴ)￣●)