If I choose the white rider 'Day', his alternate is a morning new anchor. If I choose the black rider 'Night', he'd be a cop that has shifts only at night. I was going to have a love triangle involving the red rider 'Sun' (noon) and the two riders, but then I realised how ridiculous a love triangle is.

So...white or black?

A princess could long to be kidnapped and no longer have to live the life of a caged royal...rather ignorant of the possible consequences. Then, that's when the king would probably arrange for the princess to be held hostage in a tower by _____ mystical creature/witch...probably to preserve the princess's purity/virginity, till he finds an appropriate fiancé for her. There'd be a whole lot of dramatics as a front, then the jailer 'dies', and the princess feels like she has experienced more to the world...been kidnapped, realised how dangerous the world really is, becomes dependant on her fated hero fiancé.