Well, one interesting plotline could be the characters' reactions to different events in the Hazbin Hotel universe. For example, how they react to new arrivals at the hotel. Maybe a powerful demon shows up and the characters have to figure out how to deal with them while also trying to redeem them.
A third plotline could be the characters' reactions to changes in the hotel itself. If new areas are added or renovated, how do the regular inhabitants of the Hazbin Hotel react? Do they like the changes or are they resistant? This can create a lot of drama and interesting character development.
You could write a fanfic about a competition among the demons in the Hazbin Hotel. They could compete in various challenges that test their skills, whether it's singing, dancing, or something more devious. The winner could get a special prize, like a one - day pass to visit the human world or a chance to be upgraded to a better room in the hotel. This would show different sides of the characters and create a lot of interesting interactions.
One interesting concept could be crossovers with other popular animated shows. For example, a crossover with 'Steven Universe' might bring unique character interactions. The different power sets and personalities from both universes could create engaging storylines. Another concept could be a crossover with a classic fairy - tale world. The demons from Hazbin Hotel interacting with fairytale characters would be quite a sight, like the sinners trying to corrupt the pure - hearted fairytale folks or vice versa.
The fanfic often allows for deeper exploration of the world - building. In Hazbin Hotel, the setting of Hell has a lot of potential for expansion. Reaction fanfics can focus on how the unique environment affects the characters' mental states and relationships. Like, how does the constant chaos and sin - filled nature of Hell influence a character's view of redemption? It gives readers a chance to see different facets of this complex world.
Angel Dust is another popular character. His flamboyant personality and complex backstory mean that his reactions in the fanfic can be both humorous and deeply emotional. Viewers are often drawn to his character arc and how he'll grow or change in response to different situations.
One idea could be that God decides to visit the Hazbin Hotel incognito to see if redemption is truly possible in this unique afterlife setting. He could interact with the characters like Charlie and Vaggie, observing their efforts and maybe secretly guiding them in subtle ways.
One idea could be Naruto somehow ending up in the Hazbin Hotel universe. Maybe he's on a strange mission and gets transported there. He could use his ninja skills to help the characters in the hotel deal with some of their problems, like fighting off demons that are causing trouble outside the hotel's protection. Another plot could involve the Hazbin Hotel characters visiting Naruto's world and being amazed by the different kind of powers and cultures there.
One interesting aspect of Valentino fanfics could be his business dealings in Hell. Maybe a fanfic shows him making a new deal with a rival or trying to expand his empire. Another idea could be a fanfic where Valentino has a change of heart, which would be quite a twist considering his character.
You could also write a fanfiction about a new character arriving at the Hazbin Hotel. This new character could have a unique power or a very different personality from the existing ones, which would create all sorts of new interactions and storylines. Maybe they have a special ability to see the pasts of the other characters and use that to help them on their path to redemption.
One idea could be exploring the backstories of the characters in more depth. For example, delving into how Alastor became the Radio Demon. Another could be creating a new character who arrives at the hotel and causes a stir among the existing residents. Maybe a character from a different dimension or with a very unique power.
Some might be entertained. They may enjoy seeing the different scenarios that fans come up with. Like Vaggie, she might be initially skeptical but then get drawn into the creativity of it all.