Another possibility is a young mage who has a special connection to the darkness. They might start off being curious about the emissary of darkness and end up either helping it or trying to stop it, depending on how their character develops throughout the fanfiction.
It could be the emissary of darkness itself. The story could focus on its journey, its thoughts, and its plans.
Maybe a brave knight or warrior who is determined to defeat the emissary of darkness. The story would then be about their training, their battles, and their inner struggles as they face this powerful foe.
Well, in 'emissary of darkness fanfiction', a cool concept could be the relationships it has with other characters. It might form an unlikely alliance with a hero who is trying to understand its motives. Also, the idea of its lair. Is it a dark, foreboding castle or a hidden dimension full of darkness?
A rogue thief could be the main character. They've been shunned by society and have no choice but to rely on the cover of darkness for their thieving activities. Eventually, they learn to truly harness the power of the darkness and become more than just a common thief.
Three Realm Emissaries: The Three Goddess Sisters. The main character's father was an envoy of the three realms. In this urban novel, the protagonist, Zhang Hao, lost his father when he was young. Later, he found out that his father was not only alive, but he also met a strange person to treat his illness. This allowed him to obtain the cultivation of his ancestor for 300 years and become the envoy of the three worlds. Although the three beautiful sisters of the Three Realms Emissary had reached the peak of their careers because of Zhang Hao's help, father and son could not recognize each other. I hope you like this fairy's recommendation. Muah ~😗
I don't know for sure since I haven't read it. But likely, the emissary would be one of the main characters. There might also be the people or entities that the emissary is sent to interact with, like a king or a leader of a certain group.
A regular person, say a factory worker in a dystopian society where there is no hope. One day, she discovers a secret resistance group that is trying to change things. She decides to join them, and through her own growth and the group's influence, she transforms from a despairing individual to a beacon of hope for others. This shows how an ordinary person can be the main character in such a story.
Maybe it's an existing side character from the Yugioh series, like Bakura. Bakura already has a connection to the dark side in the original series. In this fanfiction, he could be further engulfed in darkness, becoming the 'aff'. His struggle between his good side and the dark forces that are taking over him could be the central focus of the story. He would have to use his knowledge of Yugioh dueling and his inner strength to break free from the darkness.
One possible main character could be a young, wayward wizard who has been seduced by the power of darkness. He starts as an apprentice in the Mystic Force but is lured to the dark side, becoming the master of darkness. He would then be at the center of the story, with his actions and decisions driving the plot.
Another possibility is that it could be Zelda herself. She is a powerful character with magic abilities. She could be the main character trying to use her powers to stop the Keeper of Darkness from plunging Hyrule into eternal darkness.
A fallen Jedi who wants to return to the light side could be the main character. He might have been corrupted by the dark side but now is struggling to break free. His journey of self - discovery and redemption could be the focus of the story.
Another possibility is Luna Lovegood. She has a unique perspective on the wizarding world. In the fanfiction, she could be the one to lead others out of the darkness. Maybe she discovers a hidden power within herself that can dispel a great darkness that has fallen over Hogwarts. Her quirky nature and deep understanding of the unseen could play a crucial role in the story.