"I wouldn't know. I don't know any Muggles and I don't see the need to familiarise myself with their hairstyles when being among them means hiding who I am," he said. "I rather like who I am."
Regulus wasn't sure what had earned him such a warm reply. Civility should have been a given between wizards, but first names? "I'm probably going to regret this, but- what kind of answer did you expect? It's a new job, one that you apparently wanted and are rather excited about. Unless I was competing for that same position, why would I know wish you well?" He probably would have wished him well even if he wanted the position and then sabotage the man, but that was best left unsaid.
He did chuckle when Lupin went on. "I doubt your favourite relative who's currently in jail wants to kill you for betraying a Dark Lord she worships. I also doubt that all those people who claimed to be such poor victims under the Imperius have changed their minds about purebloods' superiority. I also doubt that anyone will say so. No, I'm not an outcast. They will be happy to smile and tell me how brave I was and then they will kill me when I least expect it. They are Slytherins after all and I would be insulted if they did anything different."
The offer, though was surprising. Not that he wanted a real job, but the idea of showing off his skills, impress young students, especially Slytherins. "That is an acceptable offer," he finally said. "If it's the start of some prank, like the ones you liked to pull on Severus, do know that I will have no qualms showing you and your friends exactly how much I know about the Dark Arts. If it's an honest suggest, then I can help when it comes to the older students. The first few years are too basic for anything I might know. Not unless Dumbledore wants to use the Durmstrang's curriculum."