Demon City was a Japanese anime with the theme of magic and strange beasts. The story took place in a cave where two worlds coexisted, and in the world where mages lived. The protagonist, Cayman, was one of the victims of magic. His head was turned into a lizard and he lost his memory. In order to turn back into a human and retrieve his memories, Cayman and his companion, Second-order Hall, began hunting Magicians. The animation was broadcast from January to March 2020, with a total of 12 episodes. As for the specific situation of the character's ending, no relevant information was provided at the moment.
Naruto is an obvious choice as they have an existing relationship in the original series. Their interactions can be further explored and developed in fanfiction.
Naruto is often paired with Ebisu Sensei in fanfiction. Since Ebisu was assigned to train Naruto at one point, many fanfictions build on that relationship, showing how Naruto grows under his tutelage and how Ebisu has to adapt to Naruto's unorthodox ways.
Naruto Ebisu fanfics are special because Ebisu is a rather underrated character in the original series. Fanfics give him a chance to shine. For example, they can explore his relationship with Naruto in more depth. Maybe Ebisu has some hidden skills or knowledge that he imparts to Naruto in these stories.
One great Naruto Ebisu fanfic is 'Ebisu's Hidden Potential'. It delves into Ebisu's backstory more deeply. It shows how he trained in his early days and his relationships with other characters like Iruka. Another interesting one is 'Ebisu in the Shadows'. This fanfic focuses on Ebisu's role in some of the village's secret missions that are not shown in the original series.
Well, revenge can be seen as a theme too. There are characters who are seeking vengeance for past wrongs done to them or their loved ones. Also, the exploration of different forms of magic and power is a significant theme. The various characters possess different magical abilities, and how they use or are used by these powers is an important aspect of the story.
In general, the Dorohedoro anime is quite true to the manga. It captures the key elements and the unique style of the source material. Some small adjustments might be made for better visual presentation or to fit the animation format, but they don't deviate much from the manga's core.