It's interesting because it allows fans to explore a relationship that isn't part of the original source material. Writers can take creative liberties and put Gojo and Marin in various situations, be it a fantasy adventure or a slice - of - life scenario. For example, they could be on a quest in a magical realm or just having a normal day at school but with a romantic undertone. This freedom to create new stories around them makes 'gojo x marin fanfic' so appealing.
Toge Inumaki is important too. His special cursed speech ability makes him stand out. Also, the principal of the school, Masamichi Yaga, is likely to be important as he is in a position of authority and has an influence on Gojo and the other students. There could be other characters like the members of different clans that also play roles in the complex web of the story.
Well, 'so right but so wrong' in Twilight fanfiction might refer to stories that have elements that seem perfect in one sense but are completely against the original essence of Twilight in another. For example, a fanfic might pair characters in a way that seems really cute and right for the story it's creating, but those pairings are completely out of character or against the established relationships in the original Twilight series. It could also be about plotlines that seem exciting and 'right' for the drama but are wrong in terms of the lore or world - building of Twilight.
For a beginner, 'Gojo's First Adventure' is a good choice. It's easy to follow and gives a great introduction to Gojo's character. It has simple language but still manages to capture the essence of Gojo's cool and powerful nature.