One common theme is redemption. Since Enji has made mistakes in the past, many fanfictions focus on him trying to redeem himself in Rei's eyes and in the eyes of their family. For example, he might take steps to be more understanding and less controlling.
One common theme is healing. Rei has been through a lot, so in many fanfics, the reader is there to help her heal emotionally. For example, the reader might be the one to encourage Rei to open up about her past traumas.
One popular 'My Hero Academia Enji x Rei' fanfiction is 'A New Beginning'. It explores their relationship in a post - war setting, showing how they work towards rebuilding their family bond. Another great one could be 'Rediscovering Love' which delves deep into their past and how they are trying to come to terms with it in the present.
There's 'Rei's New Friend' which is also quite popular. In this fanfic, the reader enters Rei's world in an unexpected way. It shows how the reader's presence gradually changes Rei's life for the better. The writing style is very engaging, making you feel like you're really part of the story.
The main characters would obviously be Izuku Midoriya and Rei Todoroki. Izuku is the protagonist of the main series, a quirkless boy who dreams of becoming a hero. Rei is Shoto Todoroki's mother, who has her own complex backstory and powers. In a fanfiction, they would be the central focus, with their interactions and character development driving the story forward.
One possible plot could be that Izuku discovers Rei's hidden strength. Maybe Rei has some untapped quirk potential that Izuku, with his analytical mind, helps her realize. They could team up to face a new threat in the My Hero Academia world that requires both of their unique skills and experiences.
It's not okay. Such content can make people uncomfortable and can have a negative impact on the overall image of the fan community. Fan fiction should focus on positive aspects like character development, new storylines within the boundaries of propriety, rather than delving into erotic themes.
Rather than erotic fan fiction, you can create a fan fiction about Enji's past. Explore his childhood, his family relationships, and how those experiences shaped him into the character he is today. You could also write a fan fiction that focuses on his career or his role in the fictional world, highlighting his achievements, his failures, and how he overcomes obstacles in his professional life.
His friends would probably take care of him. Midoriya would be very eager to help, using his kind-hearted nature. He would make sure Todoroki is fed and comfortable.