Fionnathehuman Stories

Accidentally (?) turned into a vampire, the reader has had no choice but to adapt to Marshall Lee's lifestyle. But his lifestyle had taken an abrupt turn into that of so...

The Ice Queen, ruler of the ice kingdom, has been known to be a rather crazy yet powerful individual. But more importantly... lonely. So lonely in fact, that she resorts...

Royal Bubba Princeton, nicknamed Gumball because of his love for candy, is President of the student council, enjoys home economics, is part of the Science Club, Chess Cl...

When Princess Y/N is scheduled to go to the Candy Kingdom for a royal dinner, she meets Marshall Lee the vampire king and Prince Gumball of the Candy kingdom. She was on...

Finn left the land of ooo for four years to explore the post apocalyptic world without jake; But when he gets back he has newfound feelings for his best friend marcelin...

It's a sunny day in the land of Ooo, and you and your robotic friend, Roberto, are going to meet two folks that will change your lives. Like halfway through the story I...

In a land far far far far away from ooo. IN MY MIND CASTLE OF FICTION! I! ICE QUEEN! HAVE WRITTEN THE BEST FAN FICTION, KNOWN TO EVERYONE IN OOO! and my prnguis.

These are sort of Gumball and Marshall Lee oneshots, though they all connect. Most of them just have a long time skip in between them, as they're all in the same univers...

Adventure time fanfic I guess! They did winter king dirty by only giving him one episode >:( maybe they'll give more in future but for now I'll write my own story on...

Prince Gumball x Reader. No more to be said. I maaay have a tiny weeny huge crush on Prince Gumball. Ok, make that a ginormous crush. He's so cute!

Life as an adventurer has its ups and downs. You save princes and make sure nothing is harming your world. You fight monsters or the Ice Queen with your bestfriend. O...

When a bubbly prince falls in love with a dangerous vampire king he'll finally find out that love really does BITE. (GUMLEE/MARBALL)

Husband (Y/n) X Pregnant Wife Ice Queen (Y/n) knew that when ever Ice Queen is defeated by Fionna and Cake She comes back and kidnaps again. again and again and again an...

Now with their world being real and having some magic. Fionna and Cake embark on their greatest adventure ever SPACE!

Marceline has never heard of Bad Little Boy, a singer that all her friends know. Until they spot a flyer saying he was going to be in Ooo. At the concert they bump into...

(The beginning is bad with grammar cause It was bad then, I just started again 4/30/19 and I will continue) 🍋Fionna is in love with a little vampire boy, and and he mi...

☆ In the Land of Ooo, Simon Petrikov seeks to heal from the loss of Betty. With the reader's support and understanding, they share a heartfelt conversation, leading Simo...

Fionna Murtons is just living her life like normal when new guy, Marshall Lee Abadeer shows up and makes it his goal to get on every last one of her nerves. (btw, the co...

Things are tense in the hot, wasteland dimension. Tempers are high, and Fionna is overwhelmed with guilt after being screamed at by a furious Cake. Simon takes matters i...