The Aquatic Kingdom
For decades, the Aquatic Kingdom known as Tethys was overlooked and ruled by King Delmar. The underwater temple was home to said king, as well as his daughter, Luna. The kingdom had lived in relative peace, at least until the king's daughter reached the age to marry. Men from land and sea were traveling to the kingdom to request the daughter's hand in marriage, and those that were rejected threatened violence upon the kingdom.
Due to fear for his people, the king decided it was necessary to arrange a marriage for his daughter, with a merman born to another noble family. The two kingdoms were to join together upon their marriage, and the alliance would prevent unnecessary attacks from outside forces. The marriage would also show the power of the two kingdoms, and King Delmar knew it was the best thing for his kingdom, and for his daughter as well.
However, Luna was extremely displeased when she discovered her father's plan. She didn't even hear it from the king first, and instead heard it from Rona, since the youngest girl could never keep her mouth shut.
Luna shoved open the doors to her father's chambers, the mermaid clearly upset as she approached the surprised king. "An arranged marriage? You promised me that it would never come down to something like that. Not without talking to me, first!" the princess began speaking before the king could ask what the problem was, and the man's frown only deepened at her words. "Luna, I know you're unhappy but you don't even begin to understand how dangerous it is to have you without a husband. I can't wait long enough for you to choose someone yourself," the king explained to the girl with slight exasperation. "And, not to mention the benefits this marriage will have for you and the kingdom. It's well worth it in the end," the king tried to sway the girl, but her small scowl still remained.
"The dangers can be handled easily, father. Our kingdom is well guarded, and it's not like someone is truly dumb enough to-" the princess started to argue once again, but was cut off my soft knocking at the door. "Come in," the king spoke up, turning his focus to the doors rather than his daughter.