Concubine Suguru as emperor Satoru's favorite, he cant be a consort because he isnt of noble blood or descent but hes the only one Gojo visits. The emperor used to consummate and spend the night with his older consorts but after he met Suguru, he stopped. Though little does he and the royal court know its all a ploy by Suguru's father, Kenjaku, trying to rise to power by claiming Suguru as his kin well after Gojo is too down bad for anyone to do anything. Suguru always knew Kenjaku was his father but he had to keep that information to himself and wait until his father returned from his two year long "trip" before even trying his hand at politics lest he anger his father and his sisters get hurt :p