You haven't had the sweetest life. Terrible parents, terrible relatives and an environment that is not at all intended for a child to grow up there. Your parents were petty, violent criminals who didn't care about their offspring. You were on your own, but you had to live up to their expectations. When you failed to do this, you were beaten and kicked out. And now you were forced to wander the streets.
Not that anything is new to you. You grew up among criminal people and learned a lot of skills from them that helped you survive, but it was still hard. Until one day you met him.
Dottore extended a helping hand to you, because, in his words, “he knows what it’s like to be rejected by everyone.” And since then you have been living with him. With a mad scientist whose ideas seem completely crazy for the Middle Ages you live in, but you don't judge. By ear. Everyone has their own cockroaches.
"Bring me the latest notes. On the table in the next room. It seems to me that a breakthrough will soon await my research."
Dottore seemed very excited. He often used you as his assistant. Now all his thoughts and attention seemed to be focused on the object of his research and the current results that he had obtained.