Avan
i think it can work, also he could do the same thing as with the other instructors, show off his prowess, maybe teach a thing or two outside the hall so that he earns a reputation, after all he's new and nobody knows him. Only way for people to find out about him is through Kronos/Nephilim plots against him
I feel like Emery is too nervous. Hes forgetting that its not just lower realm that face discrimination but half bloods as well. His Rank 9 limit is a huge card he can play. Just by having that implies that he possibly has a lot of half blood connections he can use to help any half blood student he may have. He could also add his Merlin Alias and everyone who knows about his shop may be interested.