Ratio MBTI性格类型
背景
Birthday's partner. A doctor with artificial arms and an eyepatch sealing his power, which consists of X-Ray Vision. This power used to torment him as a kid as he predicted people's deaths but meeting Birthday made him open up to others as the ill teenager told him he would not die regardless of his predictions. Ratio is also a former member of Facultas who dropped it to become a doctor after Birthday was expelled.
