Need helping making a story for my characters
So I have many OCs but I want to make a book or the “lore” about a specific thing but I am not creative at all with words. So basically the one character is real out of the rest. They all function normally, but the problem is I need there to be hints and stuff that they aren’t real and the main character called Marvin will discover those hints slowly overtime. I am not sure what they should look like the hints I mean. Just wondering if anybody has any advice, thanks!
If this helps is kinda like just a big friend group of them all going on adventures and hanging out etc, all characters have different unique personalities. Similar to a sit-com show I guess lol