There was a famous American TV show that originally aired in the 1960s called the Addams Family. Basically, it was about a creepy but comical family. The TV version was based on a comic strip of that name. You can see an episode on YouTube if you are interested:

https://www.youtube.com/watch?v=HQlB4jSy-3Q

In that show, one minor character was the daughter of Gomez and Morticia Addams and that is Wednesday Addams.In the TV show and in some film adaptations of the Addams Family, Wednesday Addams is a young girl.

In 2015, some aspiring YouTubers got the idea to do a youtube serial called "Adult Wednesday Addams."You can see an episode on YouTube if you are interested:

https://www.youtube.com/watch?v=D98aB3CtcW8

She produced several episodes but then she received a "cease and desist" letter from the copyright holder of the Addams Family in which she was threatened with a lawsuit in the event that she did not refrain from making more episodes on YouTube. Unfortunately, as a result, she stopped making more episodes of" Adult Wednesday Addams."

you can get some guidance from https://zhillerlaw.com/fair-use-wednesday-addams/ in which four factors are identified as being critical to identify an instance (or not) of fair use:

[1] Purpose and character of the use

[2] Nature of the copyrighted work

[3] Amount & Sustainability

[4] The effect upon the Original Work's Marketplace Value.

Questions:

[1] Make the argument that Adult Wednesday Addams falls under the copyright exception of "fair use."

[2] Make the counter-argument that Adult Wednesday Addams violates the "fair use" exception of copyright law.