"What you're saying is that if they really hadn't liked me, I'd be sent to fix the water heater?" Or, in other words, pay a visit to Alucard.

Sebastian's smile is easy and highlights that one day, he'll have crows' feet around his eyes. Like many wizards, his actual age is difficult to guess, but it's not unreasonable to deduce that he's somewhere in his mid- to late twenties and spent a few years living rather rough with at least a couple of those years as an underfed child.