You can start by looking on popular fanfiction websites such as Archive of Our Own (AO3). It has a large collection of fanfics, and you can use the search function to specifically look for Merlin reaction fanfiction. Another option is FanFiction.net, which also has a wide range of stories including those related to Merlin reactions.
Merlin reaction fanfiction is fanfiction centered around the characters in Merlin having reactions. Fans write these to delve deeper into the characters' personalities. For instance, we could see how Morgana would react if she found out about a secret Merlin had been keeping from her all along. It gives more depth to the characters and allows for different interpretations of their relationships and actions within the world of Merlin.
The characters would likely have a range of reactions. Merlin himself might be both flattered and a bit embarrassed by some of the fanfiction. He's a humble character, so seeing all the attention on him in these fictional stories could make him blush. And for the knights, they might laugh and joke about it, while also being a bit curious about how the fans view their adventures.
They might be quite intrigued. Merlin, with his knowledge of magic, would likely compare the magic in the fanfiction to his own experiences. Arthur, on the other hand, might be a bit more confused at first but would gradually get into the story, especially if there were elements of heroism and adventure similar to his own quests.
I really like 'Escanor and Merlin: A Different Path'. In this fanfiction, the author takes a unique approach to their relationship. Instead of the typical interactions, they are put in a situation where they have to rely on each other in a completely new way. It's full of adventure and the development of their bond is very well - written.
There are indeed. You can find them on various fanfiction websites. A lot of these fanfictions play with the concept of time travel, where Harry somehow ends up in Merlin's era. They might also have Harry teaching the characters in Merlin's world some new spells from the Harry Potter universe, creating a whole new dynamic in the story.
In a more humorous take on the 'Merlin tied to a bed' fanfiction, it could be that Merlin has fallen ill and the overly - protective Gaius has tied him to the bed to make sure he rests. Merlin, being the active person he is, complains constantly. Arthur comes to visit and teases Merlin about finally being still for once. Meanwhile, Merlin tries to convince Arthur to let him loose, promising that he'll be fine. Eventually, Gaius relents and unties Merlin, who then immediately starts bustling around the room.
The father's reaction varies. In a particular fanfiction I read, the father was first in disbelief. He couldn't believe that the young man in front of him was his son Merlin. Then, as Merlin showed some signs or told some stories that only his son would know, the father became overjoyed. He started to tell Merlin about their family history that Merlin didn't know before, which was a very emotional and bonding moment between them.
It could be for comedic effect to lighten the mood and add some fun to the story.
If Merlin died in the fanfiction, it could trigger a series of tragic events. The balance of power could tip, and the villains might seize the opportunity to attack. It could also bring out hidden strengths in the remaining characters as they try to cope with the loss.
One possible story could be about the good twin having to face the challenges caused by the evil twin's actions. For example, the good twin might be constantly trying to clean up the messes the evil twin makes in Camelot. Maybe the evil twin is secretly working with Morgana to bring down King Arthur, while the good twin is trying to protect the king. This creates a lot of drama and conflict within the fanfiction world.