One sign is that Arthur always keeps Merlin close by his side. He doesn't let Merlin take on overly dangerous tasks alone. For example, if there's a mission to a dangerous place, he'll either go with Merlin or send a lot of guards with him.
A major sign of Arthur's overprotectiveness is that he is willing to put himself in danger to protect Merlin. In some fanfiction stories, when Merlin is in a life - threatening situation, Arthur doesn't hesitate to step in front of him, even if it means facing great peril himself. Also, he may limit Merlin's movements or activities if he thinks they are too risky, like not allowing Merlin to go on certain adventures without proper protection.
Well, in many fanfictions, Arthur might be overprotective of Merlin because of their deep friendship. They've been through a lot together, facing numerous dangers and challenges. Arthur has come to rely on Merlin in many ways, and he doesn't want to lose him. So, he becomes overprotective to ensure Merlin's safety.
One great fanfiction with this theme is 'The Protector's Bond'. In it, Arthur shows his protectiveness in various dangerous situations they encounter. It beautifully captures their relationship and Arthur's determination to keep Merlin safe.
One possible fanfiction could be that Merlin gets injured during a battle while trying to protect Arthur. Arthur then becomes extremely protective, refusing to let anyone else tend to Merlin's wounds. He stays by Merlin's side, worried sick, and vows to be more careful in the future to prevent Merlin from getting hurt again.
The banter between Merlin and Arthur in fanfiction is really interesting. It can range from light - hearted jabs at each other's habits. Merlin might poke fun at Arthur's love for jousting and how he always gets a bit too competitive. Arthur could retort by mentioning Merlin's clumsy attempts at serving him. Their banter also reflects the underlying respect they have for each other despite their different social standings. It's like a friendly sparring that keeps their relationship dynamic.
The 'Redemption' trope is also seen in some fanfictions. Maybe Arthur has made some mistakes in the past, and Merlin helps him to redeem himself. Or vice versa. It's a way to explore the characters' growth and development. And then there's the 'Battle Against Evil' trope where they fight side by side against dark forces, which really showcases their bond and loyalty.
I really like 'The Sword in the Stone' as a fanfiction - like take on Merlin and Arthur. It shows Merlin as this wise and mysterious figure guiding Arthur on his journey to become king. There are also some great interactions between the two characters that show the deep bond they share. You can find it in many libraries or online bookstores.
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.
During the time of Merlin's captivity, they could have long conversations that they never had before. Arthur might open up about his insecurities regarding magic and his kingdom, and Merlin could share his true feelings about serving Arthur. This would strengthen their bond in a new and unexpected way.
It could start with a slow realization of their feelings. Maybe they were friends for a long time and then suddenly, one day, they look at each other in a new light. After getting married, they become more protective of each other. Arthur might become more open to Merlin's magic, and Merlin would be more involved in Arthur's political decisions.
One great Merlin and Arthur fanfiction is 'The Once and Future King' by [author's name]. It beautifully captures their complex relationship, adding depth to the characters. It shows Arthur's growth as a king with Merlin by his side in a very believable way.