Charlie is often paired with Lute. Since she is the owner of the Hazbin Hotel and very passionate about redemption, she might see Lute's music as a tool for helping the sinners, and they could work together on different projects.
A plot could also revolve around Lute using his music to try and rehabilitate some of the more difficult sinners in the hotel. His music has a special power that can soothe or inspire change, and he tries to use it to make the hotel a better place for everyone.
There could be. Try searching on different fanfic websites. Some might be hidden gems. It really depends on how popular the Adam x Lute pairing is among the Hazbin Hotel fanfic community. If it's not a very common pairing, it might take more effort to find really good ones.
Common themes may include the exploration of their personalities. Since they are characters from Hazbin Hotel, their unique traits are likely to be delved into. Also, themes of loyalty and trust could be present, as their relationship develops. They might face challenges together that test their bond, which is also a frequently seen theme.
Charlie is often paired with the male reader. Since she is the princess of Hell and the owner of the Hazbin Hotel, she has a big heart and is always looking for redemption. The male reader might be drawn to her positive attitude in such a negative place. Their relationship could develop as they work together to try and rehabilitate the sinners in the hotel.
Angel Dust is another one. His flamboyant and troubled past makes him a character full of potential for fanfiction. He could be involved in various storylines, such as his attempts to truly reform or his relationships with other characters that might develop in unexpected ways in the fanfiction world.
Charlie would definitely be a main character. Her whole goal of redeeming sinners in the Hazbin Hotel could be greatly affected by the presence or actions of God. Also, Vaggie, as Charlie's girlfriend, would be involved in any major changes that come about. And Lucifer could be a key character too, as his relationship with God is a central part of the lore, and his reaction to God's possible interference in the hotel would be interesting to explore.
One possible scenario in this fanfiction could be that the lute plays a significant role in bringing the two characters, the black rider and the shadow, together. Maybe the music of the lute has some sort of magical property that draws them towards each other. For example, the black rider, who is usually a solitary figure, hears the beautiful tunes of the lute while on a journey and follows it to find the source, which is the shadow. And as they meet, they start to develop feelings that they have never experienced before.
A common theme could be self - discovery. Writers might explore how Adam Lute discovers more about himself, his powers (if he has any in the relevant context), or his place in the world.
There is a recommended novel that meets your requirements, and that is Mr. Wei's Miss Pipa. The heroine of this novel was the lute girl, and the lute played a very important role in the story. I hope you will like this novel.
Charlie is one of the main characters. She is the princess of Hell and the one who runs the Hazbin Hotel with the goal of rehabilitating sinners. Angel Dust is also a major character, a flamboyant and complex sinner. Then there's Vaggie, Charlie's girlfriend, who is very protective of Charlie and the hotel.