One common theme is redemption. Since Garou is often portrayed as an anti - hero or a villain, many fanfictions explore his path towards redemption. Another theme is power struggle. Given the power - filled world of My Hero Academia, fanfictions often deal with how Garou's power relates to that of the heroes and villains.
There could also be a fanfiction that delves into Garou's past more deeply. Maybe we learn about his family and how his upbringing led him to his current views on heroes and villains. By exploring his childhood traumas and experiences, we can better understand why he is so obsessed with becoming the ultimate monster and how those roots could be the key to his possible transformation in the story.
A really interesting character interaction in Garou fanfiction could be between Garou and Genos. Genos is so focused on becoming stronger and avenging his family, and Garou is on his own path of power - seeking. Their clash could be both physical and ideological. Genos might see Garou as a threat to the order he wants to protect, and Garou might view Genos as just another 'fake' hero.
Book of recommendation: Starting from the sunflower field
The plot of this book perfectly matched the first chapter of the title,"Sunflower." At the same time, this book was also a novel of the infinite universe. It laid the foundation for transmigrators in the other world, and the use of the Plants vs Zombies system was a key element throughout the novel. The protagonist, Dai Lin, used plants and fungi to face all the challenges in this world. This was closely related to the gameplay of the Plants vs Zombies game and would bring a different reading experience to the readers. With the novel recommendation from the Plants vs Zombies system, this book is really not to be missed.πI hope you like this fairy's recommendation. Muah ~π
I'm not sure which book you're referring to because I don't know if Happy Farm and Plants vs Zombies have been mixed together. If you can provide more information, I will try my best to answer your questions.
One idea could be exploring Garou's past more in - depth. Maybe show his childhood and what led him to become the way he is. Another could be a story where Garou has to team up with Saitama for some strange reason, like an even more powerful enemy emerging. Or perhaps a fanfiction where Garou tries to train under Saitama to become stronger in a different way than his usual self - taught methods.