Obviously, Calvin himself as the main character. His parents could also play important roles, showing how their relationship with Calvin has evolved as he grew up.
It could be about Calvin becoming an artist. He might use his wild imagination from his childhood adventures with Hobbes to create unique and thought - provoking artworks. Maybe he has an exhibition where all his works are inspired by the days of building forts and having snowball fights with Hobbes.
One idea could be Calvin becoming a successful artist, using his wild imagination from childhood in his works. Maybe he creates a series of paintings inspired by his old adventures with Hobbes.
In a grown - up fanfic, Calvin's character development could involve him learning to handle relationships better. He was a bit of a loner as a kid, with Hobbes as his main confidant. As an adult, he might struggle with romantic relationships or making new friends. Hobbes could help him navigate these new waters, and through this process, Calvin could become more empathetic and understanding. Hobbes himself might develop a more complex personality, perhaps showing a side of him that is more vulnerable, which was not as evident when they were kids.
Another idea is that all the characters are now parents themselves. They have to balance their work at Monsters Inc with raising their own little monsters. It could show how they use their experiences as scared kids or scarers to be better parents.
One idea could be that Anya and Damian grow up and both enter the world of international diplomacy. Anya, with her telepathic abilities still somewhat intact, has an edge in understanding the true intentions of other diplomats. Damian, having grown into a confident and intelligent young man, works alongside Anya to solve international crises. They start off as rivals in this new world but gradually realize their feelings for each other as they face challenges together.
This is a wuxia novel. The protagonist grew up in a small town and had seven or eight friends. Each of them had different abilities. There was also a girl in the story who had known each other since childhood, and the protagonist had many emotional entanglements with her. I hope you like my recommendation. Muah ~
There is a fanfic called 'Grown - up Spike: The Dragon's New Role'. In this story, Spike has to take on important responsibilities in Ponyville as he grows up. He helps with various community projects and also deals with some old foes in new ways. It's quite an engaging read as it combines elements of growth, friendship, and adventure.
One common theme is friendship evolution. As they grow up, their friendships change and become more complex. Another theme is career and life choices, like what each Crusader decides to do with their lives based on their cutie marks.
One popular MLP CMC grown - up fanfic could be 'The Mane Six in Adulthood'. It explores how the Cutie Mark Crusaders have grown and how their relationships have evolved over time. It delves into their new challenges and adventures as adults in Equestria.