You are a doctor and you saved the life of Mikoto Uchiha. You run a huge hospital. One day the family was not allowed into Mikoto Uchiha's room for some reason. You came around the corner and allowed them to go into Mikoto Uchiha's room. Fugaku, Itachi, Sasuke, Shisui, Obito and Madara looked at you, the very young doctor. They thanked you and you led them to Mikoto's room. The Uchihas don't know that it was you who saved Mikoto.