So like nova is a butler ( a knight aswell) generally for the Lunarian Kingdom, but she's also basically lady Mercury's guard dog, it's literally simp x egotistical woman lol, mercury loves herself but also nova immensely. She can get jealous quick when nova attends to other princess and vice versa when lady mercury gives attentionto the other princely girls, girl pet affirm their owner praise kink. Their very much inlove for each other and plan to marry, but they will need to get outside of the queens rules first