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.
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.
Redemption is also a frequent theme. Given the setting of Hazbin Hotel, the idea of Adam finding redemption through his relationship with the reader is quite popular. It could involve him learning about love and acceptance in a new way.
A common theme could be adventure. Maybe Adam and Lute go on a journey together and face various challenges along the way. This could include battles against enemies or solving mysteries in a fantasy world.
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.
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.
One common theme is the power dynamic. Alastor being a powerful demon and the reader usually being a more ordinary (by Hell's standards) character. Another is the idea of redemption. Maybe the reader tries to 'redeem' Alastor in some way. Also, there's often a theme of mystery, as Alastor has many secrets.
Redemption is a common theme. Charlie is all about redeeming sinners in Hell, and an OC can either be a part of that mission or a hindrance. Another theme is self - discovery. The OC, through their interactions with Charlie, may learn more about themselves, their place in Hell, and their own potential for change. And of course, friendship or love can be a theme too, as they build a connection with Charlie.
Power and temptation are common themes. Lucifer is a powerful figure, and his interactions with the reader often involve him using his power to either tempt or protect. Another theme is the exploration of the afterlife. Since it's set in Hell in the Hazbin Hotel universe, the fanfiction can delve into what it means to be in Hell and how the reader fits into that world.
Another theme is growth. Fanfictions often show Charlie and Vaggie growing both individually and as a couple. For example, Charlie might learn to be more assertive in her relationship while Vaggie might become more open - minded, and these changes are usually related to the challenges they face together in running the hotel or dealing with other demons.