Fionna—is a 13-year-old adventurer and Cake's adoptive sister. While usually appearing as black dots, her eyes are seen as blue when enlarged. She wears a rabbit-themed hat (similar to Finn's bear-themed hat) with exposed locks of blonde hair. Unlike Finn, her neck is shown. Her outfit includes a teal blue shirt with elbow-length sleeves, a dark blue skirt, and knee-high socks with two thin horizontal stripes at the top. Fionna is heavier set than. She has a green backpack (similar to Finn's) and Mary Jane shoes. Her name was officially changed from "Fiona" to "Fionna," presumably to make it more similar to Finn's name. The pronunciation, however, has remained unchanged. Like Finn and his crush on Princess Bubblegum, it is revealed in many portraits posted that Fionna has a crush on Prince Gumball. Fionna has buck teeth like a rabbit. Fionna, like Finn, is Cake's adoptive sister.

Cake—Fionna's best friend/adoptive sister and Mo-Chro's girlfriend. She doesn't look much like Jake aside from their body proportions. She has white eyes in which the black pupils become circular if surprised, excited, shocked, or scared. She has a cat muzzle and a small nose (compared to Jake's), cat ears, white fur with many coffee colored spots, and a large bushy tail. Cake may know Morse code in order to speak to Lord Monochromicorn, similar to how Jake knows Korean in order to speak to Lady Rainicorn. Cake plays a hammered dulcimer, as opposed to a viola. Her tail "frizzes out" if it is agitated or worried. As a Lumpy Space 'cat', she is a light color of maroon with large spots of fuchsia to match her coffee-colored spots. Her tail is now lumpy and more beaver-tail-like.

Beast-a major monster in "Belly of the Monster". The beast is a curcular shaped giant with pink-tinged skin and slight blond hair on her head. Her eyes are pink with red dots for pupils. Her limbs are thick, and contain four fingers and four toes on each hand and foot, respectively.

Bunnies-special rabbits that live in the Land of Aaa. The Bunnies resemble stuffed animals in varying colors with symbols on their bellies. Each bunny has a different random symbol, much like the cutie marks from My Little Pony

Party Patty-the leader of the Bunnies in "Belly of the Monster". She is taller than the other Bunnies of her tribe and is the only one who wears clothing and shoes. Patty is much more human-like than the other Bunnies. It's unknown if she is just a special mutated Bunny, or a member of a different species entirely. She has light brown skin and big brown eyes, as well as short brown hair. She wears a light green blouse, a yellow undershirt, as well as a knee-length pleated navy skirt. She also wears brown flats and carries a brown satchel. She is mysterious and serene, and protects her tribe with her life.

Tubby-the smartest and smallest of all the Bunnies. Tubby is a small Bunny with large eyes. Tubby has dark brown skin and light brown eyes and belly, as well as curly brown hair. She also has a picture of a ham on her belly.

STOMACH OF THE MONSTER

Title Card

Fionna and Cake look down the throat of the Monster, their eyes wide and shocked...

Fionna and Cake didn't awake to the sounds of the birds, or the grasshoppers, or their makeshift wind-chimes outside their window.

They awoke to their house quaking around them, with the wood splintering and the nails snapping.

Fionna groggily sat up, her eyes circled with purple. "Cupcake," she rasped, "What's going on?"

"I dunno..." Cake mewled as she stretched her back in her bed. "Maybe it's an earthquake?"

At that moment, the entire roof of the Treehouse snapped away, showering them in leaves, wood chunks, and glass. A gigantic, sixty-foot tall, pink monster was standing before them, snarling.

Both girls stared. "Dang it."

The Monster reached into the Treehouse and grabbed them with one meaty hand. Then the Monster tossed them into her mouth.

Darkness engulfed them. The air became thick, damp, and hot. They fell for a good five seconds before hitting the tongue of the Monster's mouth. While Fionna easily stood, Cake took about a half-minute before she could stand without slipping over a taste-bud. When she regained her balance, Fionna said, "We gotta get out of here!"

A horrible, piercing scream interrupted anything else she was going to say. "NOOOOOOOOOOOO!"

Fionna gasped. "There's someone in here with us! Come on, Cupcake, we gotta save them!" Fionna pointed towards the darkness at the end of the mouth. The throat.

Cake shook her head vigorously. "Nuh-uh. I already got swallowed by a Monster. There is NO WAY-"

She cut off in a yelp as Fionna grabbed her by her neck fur and chucked her down the throat before following closely behind, screaming in exhilaration.

Now, just so you know, a Monster's anatomy very much differs from ours. The throat led to a little organ (known as a 'doracnic', that basically just led as a transfer for food to the stomach,) which led to the stomach, which either led to the lungs or the digestive track (here were two paths), and the lung path led to the heart. When Fionna and Cake hit the doracnic, Fionna landed on what seemed to be a flat rock. Cake fell into a puddle of who-knows-what.

Cake hissed, her back arching and her tail frizzing.

Fionna chuckled. Just then, a terrified, sobbing scream sliced through the air. "Let's go!"

They followed the screams. When they reached the source, it ended up being a neon green Bunny with a tea cup on its flank. It was sobbing hysterically, screaming in anguish. Fionna's heart twang with pity. The poor thing must have been here for days.

"It's OK, we're here to save you," Fionna comforted the small Bunny while Cake wiped her fur clean of who-knows-what.

The Bunny sniffed. "Did you bring more?"

Fionna and Cake spoke in unison. "More what?"

"CONFETTI!"

A record could almost be heard scratching.

"Say what?" Cake questioned.

The Bunny sobbed more. "I RAN OUT OF CONFETTI AND NOW THE PARTY WILL BE RUINED!"

"Party-?" Fionna picked up the Bunny. "I dunno if you landed on your head, or what, but we need to get you out of-"

They were cut off by a loud, vibrating, dubstep tune pounding around them, making the puddles of you-know-what waver. The Bunny gasped, its anguished face replaced with glee. "THE PARTY!" she bounded away, accidentally kicking Fionna in the face.

Fionna and Cake chased after it. The other end of the doracnic began to pound with light. When they reached the other side, they gasped.

The entire stomach had been transformed into some kind of dance-club. The floor was made out of flashing tiles. Lights from nowhere flashed bright colors. TV screens were everywhere, showing videos of dancing Bunnies or discos. A gigantic disco, the size of a troll, hung over head. A stage for karaoke stood to the far end. A small bar selling carrot energy drinks was to the right. Bunnies, different sizes and colors, were everywhere, all of them dancing and crying out in joy.

Fionna stared, flabbergasted. "These Bunnies have no idea that they're all gonna die!"

"I don't see any danger," Cake shrugged. "I mean, they may go deaf because of the music, but no biggie."

Fionna took a deep breath. "Cupcake, what happens when you digest something?"

"Well, the object that you are digesting travels down your pharynx, and into the stomach of the being."

"Yes...?"

"Then the gastric acid, if any, chemically breaks down the object into nutrients."

"Go on."

"Whatever is left of the nutrients is then passed down the digestive track. Then it leaves the body from the-" Cake cut off into silence. "...Ooooohhhh..."

"Yeeeeaaaah..." Fionna said. "Let's tell them."

The two girls approached a bright pink, pawprint-flanked Bunny and her deep orange, robot-flanked friend. "Excuse me? I haven't the slightest idea how you couldn't know this, but you need to leave immediately."

"PARDON?" said the pink one. "WE BLEED TO HEAVE INSTANTLY?"

Fionna figured they hadn't heard her over the loud music. "NO. YOU GUYS ARE LIVING IN THE STOMACH OF A MONSTER. YOU NEED TO LEAVE!"

"WHAT?" the two Bunnies stopped dancing. "WE'RE GIVING IN THE HUMMOCK OF A HAMSTER AND WE MEAD TO GRIEVE?"

Fionna sighed. "Forget it."

"SORBET IT?"

Fionna simply walked away with Cake. "We need to tell them another way."

"Hey." Fionna felt something tug on her sock.

The two sisters looked down at a small Bunny-smaller than any Bunnies they had seen so far. She had dark brown fur, with a lighter patch covering her belly. A picture of a ham covered her flank. Her light brown eyes stared up at them, wide with anxiety. "I'm Tubby."

"Hey, Tubby." "'Sup." The two girls responded.

"You're right. We need to evacuate; I know this is a Monster's stomach. I'VE BEEN TRYING TO TELL EVERYONE THAT FOR A WEEK!"

"Why won't they listen?" Fiona asked.

"Cos everyone thinks I'm too small to be smart." Tubby huffed.

"TUBBY!"

Tubby gave a cry of surprise and jumped up (abnormally high for a Bunny) into Fionna's hat. A tall, honey-orange Bunny with an ice cream-covered flank was bounding towards them. "Hey, there wasn't an obnoxious little twerp annoying you just now, was there?"

"Nooooo...?" Fionna and Cake said in unison.

The Bunny hummed and left.

"Tubby," whispered Fionna, "Is there anyway we can convince all of the Bunnies to leave?"

Bunny's head poked out of Fionna's hat. "You can talk to Party Patty. She's our leader. If you can convince her that we need to leave, all will follow."

"Can you show us where she is?" asked Cake.

"Yeah. Her room's in the brain. ONWARD!" Tubby hopped onto Fionna's head, grabbed her 'ears', and tugged them forward. Fionna let out a 'gah' sound and tumbled in that direction. Cake sighed heavily before following.

It took a good half-hour getting to the brain. It took a fifteen-minute spinal-cord pulley-system, a ten-minute hiking sequence, and five minutes of stumbling through brainage. Tubby drove Fionna like a horse the whole time. Finally, Tubby stopped, and hopped off Fionna's head as they came to a corner. "Party Patty is right around this corner. I gotta get back before someone finds out I'm gone. Bye, guys."

"Bye, Tubby." Fionna and Cake waved as the Bunny bounded away. The two girls turned the corner.

It seemed like a bedroom. It had a bright purple, circular bed with red pillows, multicolored beanbag chairs, a flat-screen TV with a video game system, and a fuzzy pink carpet. Confetti littered the floor and streamers and lanterns hung from the system. Lava lamps covered the dice-shaped cabinets. It was a nice room, but it seemed deserted.

"Party Patty?" Cake asked, oblivious to the figure stepping out of the darkness behind her. "Party Patty?" A paw set on her shoulder. "Party PAAAAAAAAAAH!"

A Bunny even taller than Fionna stepped out of the shadows, on her own hind legs. She had light brown fur and big brown eyes, as well as short brown hair. She wore a light green blouse, a yellow undershirt, as well as a knee-length pleated navy skirt. She also wore brown flats and carried a brown satchel. Party Patty.

"Oh, hey." Fionna pulled a trembling Cake behind her. "Party Patty, right? We need to talk to you about-"

Party Patty snapped her fingers. Fionna stopped talking, as if the leading Bunny had shushed her loudly. "I am the leader of the Bunnies."

"...Yes." said Cake.

"We know." added Fionna.

"If one wants to speak to the leader, thee must prove thyself to be a party-goer."

"But this is really-"

"Party or be gone."

So for the next few hours, Fionna and Cake partied.

They were forced to chug down carrot energy drink after carrot energy drink just to keep moving.

They were challenged to break-dance time after time, almost breaking a bone each time.

They had to play party games, from spin-the-bottle to pin-the-tail-on-the-dragon, over and over.

They had to compete in four pie-eating contests.

The final thing they had to do was a karaoke-off.

Party Patty: Ohhhhhh-wooooah-oohh,

so crank up the tunage and we shall never go.

Fionna and Cake: Whoah-oh!

Party Patty: We'll live on and on and on...

All: And on and on and on and on and on

and on and on and on and on

and on and on and on and on

and oooooooooooooooooooooooooooo oooooooooooooooooooooooooooo oooon!

The song ended, and Fionna and Cake crumpled to their knees. The Bunnies cheered. Then, all was quiet, with all eyes on Party Patty.

After a moment of silence, Party Patty raised a thumb, a Roman emperor granting life to a gladiator.

Everyone cheered once more.

Party Patty waved everyone off to commence their partying. She then approached the two girls, and said to Fionna, "A word, please."

Fionna nodded and turned to Cake. "Go have some more energy drinks. I'll be right back."

"O...K..." Cake began to crawl pathetically towards the bar.

Fionna approached Party Patty, who was sipping yet another carrot energy drink as she sat cross-legged on her neon thrown, which sat on a small stage at the center of the area. Fionna stood on the lighted platform in front of the throne.

"Party Patty, you are a wise and awesome ruler and I greatly respect that." Fionna said. "But what we need to tell you is dangerously important. And you said if we partied with you, you'd listen."

"And thee hath partied exceedingly well. Thee hath received my favor as co-leader of the Bunnies. The only one who shall be higher than thee is me. Thee and thy children, as well as thy feline companion, may reside here in our sanctum for however long it pleases thee."

"..."

"..."

"...THIS IS NOT A SANCTUM! YOU ARE ALL LIVING INSIDE OF A MONSTER'S STOMACH AND IF YOU DO NOT LEAVE IMMEDIATELY, YOU ARE ALL GONNA TURN INTO CRUD! WHY IS THAT SO HARD FOR YOU PEOPLE TO UNDERSTAND?!"

"...That would indeed explain the stuff that always falls from the ceiling."

"So you're going to leave immediately, right?"

"No."

"Wha-? WHY NOT?"

Party Patty sighed and stood."Fionna, whilst I respect thy wishes, I simply cannot take my people from our only sanctuary. For years, we have been hunted and preyed apon by the monsters and creatures that lurk in the outside world. It was only a week ago today that we were graced with this sanctuary." The Bunny leader gestured to all of her people. "They are safe, Fionna. And as their leader, I do intend to keep it this way." She sat back down in her throne, folding her hands in her lap. "You may accept my offer as co-leader, or you may leave. The choice is thy owns."

Fionna let out a frustrated cry so loud that all of the Bunnies stopped in their dancing and singing to stare. Face flushed in frustration and anger, Fionna ran from the stomach.

"Fifi!" Cake ran after her sister, knocking over her carrot energy drink.

Cake searched for Fionna madly. She followed the direction she went in, and by doing so, the lower half of the body was knocked off the list. She checked the doracnic, but it was empty, safe for the debris that fell through the throat. Fionna didn't have any way to get back up the throat, so she must have taken the spinal-spinal-chord-pulley-system. So she rode it all the way up. When she came to the brain, she hiked up the one and only path to Party Patty's room, but that was empty as well. Just before she left, Cake noticed two small round doors in the left and right 'walls.' She took the left one and opened it.

When she opened it, she was in a large tunnel-area. One end of the tunnel became smaller and smaller until it was impossible to pass through. The other end was the entire left eye of the Monster. It was made up of two parts, the sclera and the cornea. The sclera seemed to be solid white, impossible to see through. The cornea was like a window, and as the Monster moved, Cake saw the land pass by, small and toy-like compared to the Monster's size. The sun was setting, and through the wavery vision of the cornea, Cake could see the crimson color.

In front of the cornea sat Fionna.

Cake stretched down the ladder and approached her sister. "Fifi?"

A pause, then, "I don't understand. I plainly told her that if she didn't take her people away from here, they'd all die. But she didn't even consider. She thinks this place is a 'sanctuary.'"

The Monster hummed, as if she had been in the same situation before and was agreeing.

"You know, I don't think there's any real danger to the Bunnies," Cake replied, plopping down next to her sister. "The only threats I can see are the rocks falling down the throat, but that's it."

Fionna didn't do anything for a long moment. Then, she smiled, considering. "Yeah. It would be really bad if the Monster drank some sea water or something. That'd probably drown them."

The Monster stopped moving, and Fionna and Cake raised eyebrows. Then, they let out surprised exclamations as the Monster turned quickly and sharply. Then it turned towards the sea."

"IT'S GOING TOWARDS THE SEA!" Fionna screamed. Her fear of the sea still wasn't overcome. "IT'S GOING TO KILL ME-I MEAN THE BUNNIES! WE GOTTA WARN THEM!"

The two girls ran.

One hike, a pulley-ride, and a series of madman-style running later, the two girls were back in the stomach. As per usual, the Bunnies continued to dance and sing madly.

"We gotta bum them out somehow," Fionna said over the music, "It's the only way to get their attention!"

"I have an idea!" Cake tossed Fionna onto the stage, grabbed two microphones, and pressed a few buttons on the speakers. A slow, soft song began to play. Fionna took a microphone and began to sing.

Fionna: My dog is dead.

My cat is dead.

My goooooldfiiiish is dead.

Cake: My snake is dead.

My turtle's dead.

My Pooooony is dead.

The Bunnies slowed in their dancing. They stared up at the two girls with sad, confused eyes. Eventually, they all stopped moving. Even Party Patty was staring at the ground sadly.

Fionna: All of our loving pets

Are completely dead.

They cannot domesticate

In their headstoned pits.

We're going cry a lot

And mourn their deaths

and stuuuuuuuuuuuff!

Cake: And we'll cry over their graves.

But you can't cry enough.

Fionna: Cos when you've lost someone you love...

Both: You can't cry enough.

By the end of the song, all of the Bunnies were either crying, clutching each other, or just staring at their feet.

"THE MONSTER IS DRINKING A CRUDLOAD OF SEA WATER RIGHT NOW! EVERYONE NEEDS TO LEAVE IMMEDIATELY OR YOU'RE ALL GONNA DROWN!" Fionna screeched.

As if on cue, water began to flow into the area. At first, it trickled, then it poured, then it was gushing and everyone knew that a wave of seawater was about to come into the area. The Bunnies wailed and screamed.

"Party Patty! There has to be some way we can get everyone out of here!" Fionna cried.

"We may travel through the abandoned mines in the bowels," replied Party Patty, deep in thought.

"Uh-uh," Cake scoffed, "There ain't no way I am going through a Monster's-"

"-or we may travel through the nasals."

A silence, then Cake sighed, "Fine."

And so everyone was hurried to the spinal-chord-pulley-system. Everyone was hurried into all of the fourteen elevators and was pulled upwards. When they reached the top, they immediately ran for the nasal passage. Half of the group took the left, the other half took the right.

And when they reached the ends of the passages, they jumped.

"And...done." Fionna stopped rubbing Tubby with the fluffy towel she had. The Bunny, just to be safe, shimmied like a dog.

Every one of the Bunnies had towels. Around their necks, their bodies, and some on their heads. Fionna herself had a towel wrapped around her ears. The ground was still damp, and Fionna was still squirming on the sea water, but all was otherwise fine. "You're all safe."

All of the Bunnies cheered and whooped and danced. Even Party Patty was smiling.

...And at that exact moment, the Monster swooped down, gathered them all up, and swallowed them down.

Fionna and Cake gawked in horror. "PARTY PATTY?!"

"All is well, Fionna," Party Patty's muffled voice said through the Monster's belly. "I do believe the Monster rather enjoys our company."

The Monster nodded, smiling.

"Thank you, Fionna," Party Patty called as the Monster turned to leave. "Please visit whenever you please!"

And then, the Monsters, and all of the Bunnies inside, walked away.

"..."

"..."

"..."

"..."

"...Want some pasta?"

"Yeah."