It's not appropriate for all audiences. The 'adult' aspect of it might imply that it has content that is not in line with what a general or family - friendly audience would expect. For example, it could have strong language, adult - themed humor, or more complex and darker storylines that are better suited for those who are more mature and can handle such content.
One common theme could be character development. Writers might take the existing characters from 'Unbreakable Kimmy Schmidt' and explore their growth in different and more complex ways. Another theme could be alternate universes, imagining the characters in different settings or situations that weren't shown in the original show.
Kimmy Schmidt is purely fictional. The show was crafted by writers to bring humor and unique storylines to the audience, not based on real events or people.
No. Writing fanfic involving sexual content related to a character is not appropriate. It violates the boundaries of respect for the character and the show. It also may not be in line with ethical and moral standards, not to mention it could potentially be against the rules if the fanfic were to be shared in certain platforms.
I'm not entirely sure which 'Kimmy Schmidt' you specifically refer to. There could be many people with this name. If you mean the character from 'Unbreakable Kimmy Schmidt', it's a fictional story about a woman who was rescued from a doomsday cult and tries to start a new life in New York City.
Some better topics include Kimmy's role in a local theater production. This would allow for exploration of her creativity and her ability to interact with a new group of people. Another topic could be Kimmy's experiences as a volunteer in different places, like a homeless shelter or an animal rescue center. And how she uses her positive attitude to bring about change in those environments without any sexual undertones.