Well, other characters could start to notice his change in behavior. For instance, Arthur might notice that Merlin is less talkative and more withdrawn. This could lead to Arthur trying to cheer him up or figure out what's wrong, which could then drive the plot forward as they bond over this new situation.
Their relationship can develop as Rouge shows empathy towards Shadow's depression. She might start by just being a listening ear. As time passes, Shadow begins to trust her more and opens up. This trust can then turn into a deeper connection, and they may start to rely on each other more.
One popular 'merlin depressed fanfiction' could be 'The Weight of the Crown' which delves deep into Merlin's internal struggles and depressive state as he faces the challenges of his magic and his role in Camelot. It shows his isolation and how he copes with it.
The relationship might develop in a complex way. Harry Potter, coming from a world with a set of rules and a different magical system, might initially struggle to understand Merlin's teachings. Merlin, being from a much older time, would need to adapt his teaching methods. As Harry gradually grasps the new knowledge, they would build a mutual respect. Merlin could also be impressed by Harry's courage, which is similar to his own when he faced challenges in his time. This mutual admiration would strengthen their relationship as Harry learns from Merlin.
In Merlin elf fanfiction, Merlin's character can develop in many ways. He might become more in tune with his magical side as he interacts with the elves. Since elves are often depicted as having a deep connection to magic, Merlin could learn from them to control his powers better.
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.
A sense of powerlessness is also seen. Despite having great magic, Merlin can't always use it to change things the way he wants. This inability to fully control his situation and protect those he cares about can contribute to his depression in fanfiction.
Guilt is another theme. He might feel guilty for the things that go wrong in Camelot because of his magic, even if it's not his fault. This guilt can contribute to his depressive state. In some stories, he blames himself for not being able to prevent certain tragedies.
One great piece of 'depressed Merlin' fanfiction is 'The Shadowed Heart' on FanFiction.net. It delves deep into Merlin's inner turmoil as he faces loneliness and the burden of his magic in Camelot. The author does a wonderful job of portraying his depression through his actions and inner thoughts.
Merlin's character may become more confident. Being raised by dragons, he has a different source of wisdom. He might be more fearless in the face of danger compared to his canon counterpart. For instance, when facing Morgana's schemes, he won't be as hesitant.
He might become more confident in his magic. Among the druids, his magic would be accepted and even celebrated. So he could practice more freely and learn new spells and techniques, which would boost his self - assurance. Also, he could develop a stronger sense of community as the druids live in a more close - knit way compared to the hierarchical structure of Camelot.