He sighed because how he lamented his negligible self before, if it was him in the past, he would be given a great shock because of the amount of treasures his madams had but after serving Shadowslash for a long time, he had felt that this was just normal.
His life is vastly different compared to when he was serving Leo, at the present, his identity is much more grander than many of the city lords in this continent, he felt proud to be a butler, his children and wife was proud of him.
Especially his two sons, because of his identity, they managed to join the elite squad of this kingdom, his daughters on the other hand are now sitting on a position that they would never dreamed of achieving before.
All of this because of Shadowslash, without him, they would never obtain their present happiness, the butler was grateful to him, he doesn't express it in words but he shows it with his action.