Okay, so please go easy on me. This is my first fanfic! Wish me luck and I would love some constructive criticism! Thank you!

Main characters: Fiona, Marshall lee, prince gumball, cake and flame prince

Fiona's pov

Gah! I couldn't be late again! I had to meet gumball for a new experiment and I had already been late the previous days. Attire? Check. I wore my bunny hat, blue tank top, and dark blue shorts. Hair combed? Well I wouldn't go so far as to say combed... Oh well.

Cake had left me a note informing me that she would be visiting lord M, her boyfriend and wouldn't be back until later. Thanks cake... You could've at least woken me up.

Breakfast? Just going to grab an apple. I heard a knock on the door, my ride was here. I greeted Marshall lee the vampire king at my door, he promised he'd come to help with the new test serum. "Ready for Gumbut to stick you with some needles?" He asked in a joking tone. "Hah, I bet you he'll stick you for no reason!" I retorted. "Anyways we better be off. We don't want to upset gummy!" And so mar welcomed me under his umbrella. He held me incredibly close to him. Hopefully he hadn't noticed my face become evermore so red. "Hold on girly! We're traveling marshy style!" He said as he gripped me closer to him.

We flew at a neck-breaking pace. Hey! where was my apple? that was all I had for breakfast! Within seconds we were at the candy kingdom. We were quickly ushered in by peppermint maid who showed us to the experiment room. What did gummy have in store for us today?

Marshall's pov

Jeez. Fiona looked really cute today... more thoughts of fiona popped into my head as we walked to the experiment room. The way she clung to me during our ride over was adorable. Especially because I stole her apple without her realizing it! I couldn't help it, I was hungry, and if Fiona blushed anymore I was going to drink the red from her checks.

But enough about her, I cleared the thought of the blondie from my head.

She's just your friend. Just a friend. I couldn't get her out of my head, what was going on with me today?

The huge candy doors swung open, preprint maid left our sides, and we walked in to the elaborately decorated bright room. "Hey Gumbut!" I said. Gummy didn't care for his nickname. "Hello Marshall lee," he replied. "Don't forget about your main test subject!" Fi yelled as she embraced Gummy in a flying hug.

"I'd never forget about you" he smiled. Why didn't I get a hug like that?

Gumball's pov

Ah they were finally here! I was wondering when they'd show up. Marshall stuck with the rude nickname he had given me. Figured. Fiona looks dashing as always, oh a hug? For me? I blushed and smiled. "Okay test subject, please sit down on the hospital beds." I prepared the syringe, must be careful... this one may be potentially dangerous if I spilled one single small drop.

I dabbed Fiona's arm with antiseptic and slowly stuck the strange liquid into her arm. It was supposed to make her invisible. Obviously I couldn't test it on Marshall. He could turn invisible anyways. He'd help me if anything went wrong... Fiona gasped and stuttered, falling off of the hospital bed. This shouldn't be happening! It should be smooth and quick! Marshall stated at me hoping this was part of the syringe.

Fiona's pov

WHAT WAS HAPPENING? I shuddered. It felt like venom was injected into my veins as I writhed on the floor. Was I dying? Gumball fell to his knees and held me in his arms.

"This shouldn't be happening!" He shouted. "B-but don't w-worry! I have t-his under control!" He stuttered. I'm b-becoming transparent. My limbs became numb and I... I'm blacking out-

Marshall lee's pov

GUMBALL! What have you done to her?! I kneeled down to catch her as she fell, "She needs medical attention Gumbut! Right now!" Gumball took ahold of her and rushed her to the nearest hospital room. "It'll be okay Fi..." She was laying down, and despite being unconscious, squirmed uncomfortably, only partially opaque. Thanks to Gumwad.

"She'll be okay right?" I asked Gumwad. "She should be okay and awake in a few hours. I don't know what went wrong! Maybe I didn't add enough bubbles..." "SHUT UP!" I was steaming "I SWEAR if she is hurt ANYMORE by YOU OR ANYONE it will mean your THROAT!" Gumwad looked terrified and I immediately regretted what I said. "Sorry Gumbut... I... just want her safe..." Poor Gumbut. I went crazy.

Gumball's pov

"Oh glob Marshall... calm down. I know what you mean. I'm scared that she'll be hurt further and that the potion won't wear off for another few days..." I explained. "Well I'm going to stay here for a while." Marshall said. "Where's an empty room?" He asked me. "Left wing room c" I replied.

"Hey why don't you leave me for a while"

"Whatever Gumbut."

"Oh and don't call me Gumbut."

Fiona's pov

Gumball was the only one in the room, he looked surprised as I woke up. "Gummy what-" I flinched. The pain just got worse... my veins were like liquid fire... I was... Transparent. It worked! I stared at Gumball, "Hey Fiona, how are you doing? I know you're in pain but soon the painkillers will kick in."

"Gummy- I... w-what happened?"

"We'll Fi, um the syrup caused you so much teams that you fainted."

"Oh..."

"Listen Fi, I'm so terribly sorry for the pain I caused you."

Gumball's pov

By the time I had said my last word to her she had fallen asleep. She tossed in her sleep. I should leave her. Glob, Marshall really was shaken up about her. I have a feeling I know what's going on. Marshall likes her... But that's a problem, because I like her too.