A/N: My first fan fic, so constructive criticism would be appreciated!

Disclaimer: I don't own Adventure Time or its characters, so, yeah. Enjoy!

Prologue

Fiona was a human. The last of them, actually. She was seventeen years old and lived in the land of Aaa, a mutated earth scarred by a massive nuclear war. She lived in a large tree house with Cake, a talking cat who could grow, shrink, and change shape; it's a whole bunch of mutation science, according to Prince Gumball, a prince MADE of gumball, yet still quite alive and extremely intelligent. He ruled the Candy Kingdom, which wasn't too far from the Treehouse.

Marshall Lee was a vampire king. He was a thousand-and-something years old and was born and raised in the Nightosphere, similar to the underworld but was inhabited by more demons than lost souls. He lived in a house, which was in a cave, obviously to protect him from UV rays because he's a vampire! But it also meant that he hardly got any visitors, and he couldn't be more happy about it.

Marshall and Fi were friends, at least that's what she thought. However, Marshall had some pretty strong emotions running through his head whenever the blonde heroine was near; Prince Gumball also had some mushy gushy stuff going through his heart when he saw Fiona. Marshall and Bubba (Prince Gumball) were very aware of one another's feelings for Fi, and were at a constant war for her heart; but they were subtle so Fiona wouldn't be mad at them, for all she wanted was the two to be friends.

Chapter 1-Fiona's Point of View

"Dude! Cut it out!" I exclaim as Marshall nuggies me, bursting into laughter at the sound of my plea; when I get irritated, my voice gets high-pitched, which is hilarious to Marshall, but I don't find it funny.

I turn to Bubba, who's snickering in the corner, curled up in a ball on the pink chair. We're at his kingdom in his sitting room; Marshall and I are sitting on a red couch across from him.

Right on cue, my instincts kick in, my fighter instincts. My hands reach up and grab Marshall's shoulders, then in a a swift motion he flips in the air and lands on the ottoman in front of Bubba's chair. I run my fingers through my long blonde hair, smoothing it out; my hair runs down to my knees, so finger-combing it takes a minute.

Marshall and Bubba are staring at me,their mouths gaping.

"Mmm…Fiona," Marshall groans as he rubs his head and stretches, causing a loud popping sound. "Now I know not to mess with you," he says as he plops down on the couch next to me; he's careful to keep his distance though.

Bubba clears his throat. "I'm going to get a pudding cup. You guys want anything?" he asks.

"Nope!" Marshall and I say in unison. Bubba throws Marshall a strange glance thens hurries out of the room. When he leaves, Marshall morphs into a giant demon bat and waits by the door. A few moments of silence pass when the knob turns, and the door is slowly pushed open.

"Ahh!" Bubba's scream fills the air as Marshall-the-demon jumps out, growling and waving his claws in the air, careful not to harm Prince Gumball. His eyes were wide as he fell against the door frame, his hand on his heart. Marshall turned back into a vampire and bent over laughing; I was lying on the floor, wiping a tear from my eye, when Marshall stumbled over, still laughing, and lent me a hand. When I stood up and saw Bubba shoving pudding in his mouth with his eyes closed (he eats his fear), I burst into laughter again, leaning against Marshall for balance. He grabbed my shoulders and stood very still like a stone statue, strong and reliable.

The door opened. "Prince Gumball, you are needed in the entrance hall. Flame Prince is coming, remember?" Peppermint Maid asked, her hands on her hips.

Bubba checked his pink pocket watch and dropped his pudding cup.

"Oh my glob!" he exclaimed. "I have to go. Fiona-" his eyes threw daggers at Marshall, who was still holding me- "you can come meet the prince with me, too, if you'd like," he offered, his eyes full of hope.

"Uh, sure, that would be great," I replied, releasing myself from Marshall's sturdy grip. "You coming, too, Marshall?" I asked.

He looked from me to Bubba and back to me, and hesitated before he finally said, "Uh, sure. What the hey?" a devious smile manifested on his lips as Bubba grunted with frustration. There was a glint in his eyes as he took my arm and we headed to the entrance hall, preparing for the arrival of Flame Prince.