2nd Prince <<< Her Father <<<<< Her Brother < First Prince << Sigurd < normal human beings.
Yeah, the 2nd prince is the worst, but her father isnt much better for ignoring anything for like 10 years... her brother does only care about himself, the families reputation and doing his kingdomjobthingi obviously, who cares about their sister anyway right? ... and the 1st prince, well, there are good points, but in the end her torture (and thats pretty much what it was) was just some fun game for him, so still not really a decent human being...
Sigurd is near tho, he isnt her family and stuff, so its understandable that he put his job before her well being for the time it needs to be.