If any isekai story I have read, if I somehow got isekaied, one thing of not is never deal with nobles especially pervert assfat like that. If I have unique power or OP, and have to deal with that ass, I WILL make sure that jerk die at least today
He's not oblivious, but he is a virgin over multiple lives (with the negative self-esteem issues that come with that lack of experience) and, as such, likely can't envision anyone having strong enough feelings to follow him if he leaves. Lily leaving the guild to avoid the royal whale might have crossed his mind; Lily leaving the guild specifically for him? Absurd.I know Girold being oblivious is part of the shtick, so he shouldn't expect the other girls to follow him to the island, but at the very least he shouldn't be shocked about Lily coming to follow him. If she stayed at the guild, as soon as whatever sycophant replacement comes in to take Girold's place takes charge, they would immediately approve the archduke's request to take Lily, rendering the whole demotion pointless. She basically has to go with him to the island (or otherwise disappear) in order to escape the archduke.