Responses
Probably cus they know he doesn't like his fiancee, and maybe they don't approve of him having that woman as a fiancee xD they most likely thought he would end up finding another lady to marry and didn't think too much of it
Well the sis just said that, the fiance is looking down at dragon knights, and always saying they are "unrefined and barbaric" and having some nasty temper, so neither the sis and the other dragonknights like the fiance, assuming the ML don't like her either.
This is literally what those villainess isekai stories were based on LMAOOOO. At the beginning i was thinking "oh what if this heroine encounters a villainous fiancee in the other kingdom?" Boom. It also kinda irritated me that the others didnt even hinted at the ml having a fiancee when they saw her riding his dragon bruh like cmon man