My favorite trope for royal yanderes is ‘love at first sight’ with a random commoner darling who doesn’t want anything to do with royalty
When they meet at the market, or perhaps just catch their eye at the wrong time, and the royal just pursues and pursues and pursues. You can shoo them away but it only makes them want you more, and if their a masochist who enjoys you getting mad and even hurting them to get them away? We're in for a good time.
-Mommabean











