Arthur might be initially shocked and confused. He's used to Merlin being in control. But then he might find it quite hilarious and start teasing Merlin about it.
Arthur could be concerned at first. He might think Merlin has been poisoned or something. But once he realizes it's just drunkenness, he'd probably be a bit exasperated. He might try to get Merlin to sober up quickly because he doesn't want his servant to make a fool of himself in front of the court. He could also use this as an opportunity to get some secrets out of Merlin if he suspects there are any.
If Merlin gets drunk in a fanfiction, Arthur's reaction would depend on his mood at the time. If he's in a good mood, he'll probably just laugh it off and maybe help Merlin get to his bed. But if he's in a bad mood, he could be angry and scold Merlin for being irresponsible. However, deep down, he would also be a bit protective of Merlin and make sure he doesn't get into too much trouble.
He might also get angry. Merlin has his own pride and after all he has done for Arthur, being insulted like this would make him furious. He could start yelling back at Arthur, listing all the times he has saved Arthur's life or the kingdom.
Her best friend might be very concerned and protective. They would try to keep her from doing anything too crazy while drunk. For example, if she tries to walk into traffic, they'd stop her.
Merlin could be heartbroken. He might retreat into himself and become more withdrawn. After all, he has a deep bond with Arthur, and this sudden break - up would be a huge shock.
Merlin would be very worried. He would probably stay by Arthur's side day and night, using his magic secretly to try and heal him. He might also search for rare herbs or magical items that could cure Arthur.
He might be initially startled. Arthur is used to a certain propriety in the court, so having Merlin suddenly on his lap would catch him off - guard. But then, depending on their relationship at that point, he could either laugh it off if they are in a very friendly stage or he might be a bit flustered and ask Merlin to get up if there are other people around.
It could be a very strange and creative plot. Maybe there's some sort of magic involved that allows Merlin, who is usually male, to become pregnant. It might explore how Arthur and Merlin deal with this unexpected situation, and how it affects their relationship and the world around them.
Yes, there might be such fanfictions in the vast world of fanfiction. However, it often involves non - canon and creative interpretations of the Arthur and Merlin relationship. You can search on popular fanfiction platforms like Archive of Our Own (AO3) to see if there are any stories with this premise.
Merlin might be initially shocked and heartbroken. He has been so close to Arthur, and this sudden forgetfulness would be a huge blow to him.
Merlin would likely be seen as a bit of an enigma at Hogwarts. His magic is different from the norm, so he might be a bit of an outsider at first. But his kind heart and loyalty would soon win over his classmates. Arthur would be the brave and headstrong character, perhaps a bit like a Gryffindor version of his usual self. He'd be eager to learn about combat magic and would probably be a natural leader in group projects or Quidditch teams.
Merlin would probably be very conflicted. On one hand, he is loyal to Arthur and Camelot, but on the other, being forced into a marriage is a huge infringement on his freedom. He might be scared about how this will change his life and his ability to use his magic secretly. Arthur, on the other hand, could be initially resistant as well. He sees Merlin as a friend and a servant, and this sudden change to a marital relationship would be strange for him.