DatYuriThough wrote...
I have the idea ingrained in my head from recent university applications that using the same title or word constantly detracts from the quality. That must have been somewhere in my unconscious mind when writing it.
As for your question of fallen, if I were to continue the story the back story of the green haired girl would be she hails from a clan that opposed the calls from surrounding nations to unite in order to increase their strength. Her country resisted (this happened hundreds of years prior to this story) and the other nations united and conquered them, stripping their royal-status and subjugating them to servitude. Her bloodline is then referred to as, in a derogatory sense, the 'Fallen (Insert appropriate royal term here)' as a result. Obviously I didn't expand upon this but I'm still at the stage of drafting idea in my head.
Ah, cool to learn a bit of the back-story.
I would agree, of course, and say that using the same term constantly is too repetitive. However, I don't think this is an issue of repetition as much as it is using terms that give implications of the opposite, resulting in an error in reader comprehension that you want to avoid. Obviously you shouldn't use mistress constantly, but that using nouns other than "master" to call the primary princess would be more acceptable, for example: ruler, leader, liege. I only say so because there is controversy attached to the master-mistress combo of whether or not they are true opposites. Honestly, it is up to you and it even is acceptable as it is, but I would make motions to avoid it altogether, personally.