Fanfic idea: Buck has an twin sister, but they look exactly the same, like if Buck grew his hair, shaved and put on make up, they would look the same. So imagine she was also a firefighter with the 118, but they didn’t tell anyone they were related (she could have a different last name because she was/is married, or something) and everyone is like: “wow you look so similar” and they just keep confusing people in very different ways. Like she’ll just see Buck for the “first time” and just say something so random, but also so specific that only someone who knew him would know it. And everyone asks like, so you know each other, but they just keep saying no. I just think this would absolutely hilarious if it’s done right.
I may write a fic like this, my Ao3 is Rainbowblob