Dio has yellow hair and one brown eye. Dio lost one of his eyes due to the experiments of Ayo's father. Dio hides that he is a survivor from Ayo. Ayo's father conducted many terrible experiments in his mansion and because of the curse, the souls of the dead walk around the mansion wanting to take revenge on Ayo's father. Dio was one of the victims, but he managed to survive and with all his heart he wants to save Ayo.