Sun/Moon/Eclipse as Merms x Sailor Reader AU,, but. Free Baby’d
(also, pls consider. idea: all of them think the baby is theirs bc none of them know how humans make babies so they just assume humans only need to spend time with the one they love the most and bam, baby appears)
Sun: No way, the baby is mine!!!! Look at their smile!!!! It's just like mine!!!
Moon: FALSE they DEFINITELY have my eyes
Eclipse: You're BOTH WRONG,
*three hours of petty squabbling while Reader tries to get baby to go to sleep*
Bonus doodles/silly bs lol
sun, analyzing the evidence (mate has been avoiding him, has made a nest, is currently holding an infant):
sun:
sun: OH MY GOD DID YOU HAVE A BABY????????????????
reader, holding an infant fish they randomly found, panicking trying to figure how to be a fish-parent, worried that their fish friends might try to fucking EAT THE BABY: HUH???
/
sailor reader who befriended some mers and now the way they let each other know theyre around is by singing a call-and-response type song and waiting for the other to respond
also eclipse is Big Scary Outside, Tiny Puppy Inside in every au i make, sorry but im right
/
Bonus bonus: You are a sailor that can’t swim. Moon takes advantage of this by constantly pulling u into the water so u have to hold onto him. It didn’t go very well the first time tho lol