kind of a side detail, but I think the reason why Nocton is sweating (?) is because he drank the holy water himself. From my knowledge of typical manhwas, when a person has black magic in their body, it will clash with the holy water, so maybe that's why Nocton seems sort of uneasy and wanted to leave first. Of course, despite its effects, he is deciding to stay because Aaron now appeared and wants to assert his dominance or something out of jealousy for Duroa.