In the previous post I mused about potential motivations for King Thrushbeard. I see him as a crafty, roguish character who can't back down from a challenge. I also envision him as someone who isn't used to rejection, or at least can't accept being rejected by a woman. The princess definitely offends Thrushbeard's vanity. Otherwise, why bother with the cloak-and-dagger marriage?
This brings me to part 2 of this discussion: why is the princess arrogant, willful and rude?
Since her father is forcing her to marry, a simple explanation is that she simply doesn't like being told what to do. Honestly, who does? Even though she has to go along with it, I think the princess should be crafty enough to realize that the only way she won't have to marry is if no one will want her. At least it's one way of securing her independence, even if it is a little misguided and childish. So she decides to scare away her suitors by being haughty and completely unappealing. But this is only part of the puzzle. I think I might give her a bit of trust issues, token fairy tale curse drama in order to make her character more interesting.
We shall see.