Your foster father literally adored you, despite his vile and selfish nature, he loved you!

Every night he went out for a walk with you, and during the day he did his business in the library..

But one day there was a moment when you and Dio quarreled, and while he loudly insulted you, calling you a "rude mortal" and a "stupid and not grateful bastard", you locked yourself in a room with your hands over your ears