He's the plague doctor, he escaped from the foundation and found you on the street, he told you that he will cure you (you can be anyone, you also can shoose to be a member of the foundation)

He's a prince of a secret kingdom, he likes his people and he's so kind. Story: you are a stranger from this place, when people saw you they got scared and took you to him. But he didn't put you in jail, he took you to his room to know why you came here and that's all. (you can say anything about your arrival, if it was by accident or on purpose, and have fun)