I love that it plays on the rest of his class's image that Iruma's always been a sheltered rich kid when we should know better, but also likely completely forgot by now. And then it immediately shatters Lied's impression of Iruma when he flips into a hardcore survivalist in the blink of an eye and without outside suggestion like his temporary demon lord personality flip. It's great because Lied only a few chapters ago compared him to a cinnamon roll. Might be the first scenario where Iruma naturally has the advantage with years of experience instead of being the odd one out as the secret, borderline defenseless and clueless, humie in the demon world.