Grey didn't know why Sylvia asked about the Northern Continent. Since he had already been able to clarify why she was training him, he was satisfied.
He still didn't know if he would be able to participate in the competition, and for now, he wasn't thinking about it. There are more important things to worry about, like the mark for example.
Because of the mark, he knew staying outside a city would endanger him. Since he was still with Sylvia, he could stay in the woods and train, but as soon as he was alone, he would try his best to always stay in cities.
He hadn't been able to create an array that had been able to seal off the aura that the mark released, so he was still worried about it.