Hello Readers!~ I love Star Vs. The Forces of Evil. I friggin love it!~ i was recently re-watching the Saint O's episode where they snuck in, and my mind wandered to, what if Marco was a girl. So I wrote this Fem!Marco version of the show! But with my own twists and turns. I'm an avid shipper of Tomco (Tom x Marco), so yeah. I'm going to be incorporating that much later into this. I'm going to try to follow cannon, but give my own tweaks.

Hope you enjoy!~

:D


Marcellia Estrellas Milagro De La Vida Diaz was very pleased with herself. Not once today had she heard her dreaded nickname of "Safe Kid". It made her giddy with joy. But she couldn't be too giddy, oh no. She did have to represent herself as "A Misunderstood Bad Girl" after all. She sat back in her chair, propped her legs up on the table, Crossed her arms, and grinned to herself. 'Oh yeah~ Look out for the Bad Girl!~ You see me everyone? Look at how bad I am!' She scanned the room and a pout quickly formed on her lips as she realized no one was seeing her in her absolute moment of Bad Girl glory. Huffing in agitation, the Latina readjusted her sitting position to normal, and immediately got to work on the classroom assignment. Hey, just because she was a "Misunderstood Bad Girl" didn't mean she had to fall behind in her academics! She quickly answered the questions on the sheet and placed her red pencil back onto her desk top. It was getting hot in the room. She grabbed her red hair tie from her arm and quickly tied her chocolate fluffy brown hair up into a messy ponytail. She would rather die than take off her favorite red hoodie. Giving a quick sigh she realized she answered number ten wrong, and quickly went to correct it. A look of intense concentration was present on her face.

The intercom switched on giving off a but of static."Marcellia Esrell... Estrell... Marco Diaz! To the principals office! Marco Diaz to the principals office!" The intercom switched off.

Marcellia blinked in shock. Her brown eyes staring widely at the blackboard before they narrowed into a look of pure mischief. She draped one arm over the back of her chair and smirked. "Ooooh!~ Looks like someones in trouble!" She pushed her pencil to the top of her desk and glanced around the room in anticipation. She pointed to herself with her thumb. "Soo~" She stood up and slid in front of her desk, which so happened to be in the front of the classroom. She stood up straight crossed her arms behind her back and smiled brightly at the class. "I guess everyone who voted me "Safest Kid" is feeling pretty embarrassed right about now." Marcellia smirked cheekily and rocked back and forth on the balls of her feet.

The class continued to stare at her in a bored fashion.

She slid up to Miss Skullnick's desk and leaned forward to whisper to her worriedly. "Soo... Do I need a hall pass or..."

The orange haired middle aged woman growled at her as she stopped painting her toenails red. "Would you just go already?!" She glared fiercely at the girl.

The Latina squeaked in slight fear, her eyes widened and she immediately schedadeled out of the class room and towards the principals office. When she realized she was almost there, she immediately slowed her pace down and changed her posture to relaxed and chill. Stuffing her hands in her hoodie pockets she glided up towards the principal. Her grin only widened when she saw the figure of authority. 'I wonder what I did!' She giggled internally, thrilled with the thought of possibly being in trouble.

The principal grinned upon seeing her and hoisted a chest over his shoulder in glee. "Marco!~ I want to introduce you to our new foreign exchange student!" He gestured towards the water fountain. "Star Butterfly."

Marcellia's cocky smile fell in disappointment. 'So I'm not in trouble then...' Her brown eyes landed on the blonde girl playing with the water fountain. She rose a brow in question when the girl jumped back in fright when the fountain spewed water, and took a fighting stance. "Huh?" Her confusion showed on her face.

Seeing her confusion, the principal laughed and readjusted his glasses. "I need a responsible never take chance type to keep an eye on her, as she's very important where she comes from." He snickered joyfully. "And who better than you! The Safe Kid!" He patted her on the back happily.

Her eyes widened and she flinched back in shock. "WHAT?!" She screeched. Inhaling and exhaling she quickly calmed herself and regained her composure. "No no no no." She waved her hands in a frantic motion, and ignored the principals annoyed look. "I'm completely wrong for this job sir!" She crossed her arms and tried to glare at the pudgy man. "I'm a misunderstood Bad Girl!"

He grinned cheekily, and pinched her cheek while shaking it back and forth. "You're hilariously adorable Miss Diaz!" Snickering he released the teens cheek and glanced greedily at the chest. "Now then~ If you'll excuse me!~ Daddy's off to the ice cream shop! Gotta go and buy all fifty-two flavors Ooohheehhee~" He giggled and hefted the chest with him as he left the two girls in the hallway.

Marcellia groaned and scowled in disappointment. She turned her attention back to the blonde who was currently... viciously gnawing and biting at the water fountain? 'What in the name of karate...?' She groaned and pinched the bridge of her nose in annoyance. "Alright Diaz, you've got two choices... You can either ignore this and go back to class, or just deal with it..." she grumbled. "Um... H-hello? Star?"

The girl with the red devil horned headband stopped aggressively chomping on the fountain and turned her attention to the other female. Her eyes widened with delight. Star released her prey and bounded over to the other. "Hello! nice to meet you! I'm Star Butterfly!" She smiled widely, her blue crystal like eyes sparkled in joy.

Marcellia reared back at the brightness of Star's orbs. She stuttered. "R-right... A-anyways! I'm going to show you around the school now." With a sigh, the disappointed female trudged around the campus for fifteen minutes showing off their rather small school. She dragged her feet, and desperately wished for this day to end.

Star skipped and bounced merrily around the sulking girl. Her eyes trailed around excitedly at her surroundings. She landed in front of the Latina and giggled excitedly while clutching her wand to her chest. "Thanks for showing me around Safe Kid!" She walked backwards with a bounce and chewed on her wand.

Her eyes widened in an angry shock. An appalled look crossed her features. "Argh! What? No!" She grasped the air in front of her angrily, her fingers twitching in annoyance. She threw her hand to the right in a denying motion. "Look! Whatever you heard about me is completely wrong and is untrue!" She stared at the foreign exchange student with pleading eyes.

Star, was however oblivious to her companions gaze, for her attention was elsewhere. The princess stared in awe up at the sky and pointed her finger in shock. She quickly gasped in glee at the weird rectangle on a stick the man in a gray outfit was carrying. "Whoa!" She waved giddily at the man and trotted over behind her guide. "Hi!~" Placing her wand in her mouth once again, Star gazed around.

This all went unnoticed to Marcellia who was busy ranting about her "Misunderstood Bad Girl" routine. "I don't understand why or where people get the idea that I'm so safe!" She threw her hands out in front of her in frustration, before quickly wrapping an arm around Star's and pulling her a little to the left. "Oh careful watch your step, loose tile." She pointed to it as she kept walking. She released Star's arm as the hyperactive blonde ran to look inside the trashcan. "It's ridiculous! Careful." She slammed an open locker in front of Star closed and stuffed her hands inside her hoodie pockets. "UGH! You wear a helmet in a gym shower room one time and your labeled for life! Oh! Be careful, broken glass." She grabbed Star's shoulders and ushered her around the glass. She glared weakly at the pile of small shards. The agitated female pulled her hands our from her pockets and clenched her fist. "Frankly I like taking risks, and I'd welcome a little danger in my life!" She punched her fist against the palm of her other hand.

Star blankly stared at the ranting girl. Her eye's trailed to a butterfly that flew over head. Star tilted her wand up and blasted the small creature with magic. A huge smile blooming on her face. After she blasted the butterfly she clenched the wand to her chest and hoped that her guide would enjoy this.

Marcellia's anger rant paused as she stared at the mutant butterfly monster with blue feather like wings, a white fuzzy head and a bright pink body and antennae. 'Oh... My...' She shrieked and jumped back as the mutant creature screeched at her before grabbing a boy and flying off with it. She jumped behind Star and gipped her shoulder's tightly while staring at the creature with eyes wide with fright. "WHAT THE HECK WAS THAT?!"

Star stared gobsmacked in shock. 'Whoopsie Daisies!' Snapping out of her state, she giggled and placed her hand to her mouth in slight embarrassment. "Ooops! I thought you wanted a little danger!" Star waved her hands in front of her, emphasizing her point.

The still shocked female jumped away from Star and glanced at her out of her peripherals. A look of caution and warning came upon her face. She slid a step to the right to get away from her. "Who are you?"

She smiled politely, dipped down and spun around. Her wand created sparks and rays of light behind her. "I'm a magical princess from another dimension." She made an arch above her head with her wand and a rainbow sprouted out from it, along with cute furry woodland creatures. Star smiled widely at Marcellia. She continued to smile even after her rainbow caught fire and the woodland creatures ran away screaming and burning.

Marcellia stared with wide eyes and her mouth hanging open in disbelief. Shaking herself out of her stupor, she smiled politely at Star and grasped her hands together, "Well then! That brings us to the end of our tour!" She slid away from the girl again and began quickly walking away. "I'm going home now."

Star perked up and waved enthusiastically at her. "Bye new friend! See you tomorrow!" The rainbow was still flaming, and the fire spread to the roof above her. "Bye bye!"

She freaked and pulled up her hood and looked straight ahead in panic. 'Screw this! I'm out!' Her legs moved faster and carried her into a run. There was no way she was staying anywhere near this girl! She ran far from Star. Pretending she didn't hear the others excited goodbyes, or calls of "new friend", or the fire engines blaring on their way to her school to put out the magical fire or the screams of those around her. She heard NOTHING.

-Time Skip-

Marco dragged her feet and was pleased with herself that she was finally home. She sighed tiredly and opened the door to her home, only to instantly recoil at the sight of the girl she tried to escape from laughing on the couch with her parents. 'Just how in the name of Bruce Lee did she get here before me? I left earlier?''

Mrs. Diaz turned her attention away from Star and smiled at her precious daughter. "Oh! Marco! Come here and meet the new foreign exchange student who's going to be living with us!" The Diaz matriarch stared at her child expectantly.

Her mouth hung open in shock. "Whaa... Whuuu?"

Star bounced excitedly on the couch before shooting off of it, and stood in front of a very frustrated Marcellia. She locked arms with the girl. "Whaaaaaat?! I didn't know these were your parents! I just assumed everyone on Earth had the last name Diaz!" She grabbed her new friend's hand and shook it excitedly between her own.

"Mom..." Marcellia stared in horror at her mama. She begged this wasn't true.

Oblivious to her child's dilema, Mrs. Diaz clasped her hands together in delight. "Won't it be nice to have Star's upbeat lively energy around the house?"

Marco stared at Star warily. 'She won't let go of my hand... Oh god she's still bouncing... Are her pupils fully dilated? What in the?' She groaned. "We could have gotten that from a litter of puppies Mama." She glared at the elder woman.

Star gasped and shrieked, actual stars appeared in her eyes. "I love puppies!" Releasing the brunette's arm Star gripped her wand tightly and summoned a litter of puppies.

Mr. and Mrs. Diaz cooed at them.

The puppies released laser beams from their eyes causing multiple pieces of furniture to burn or get holes through them.

Marco ducked out of the way of a laser beam and stared at her parent's facial expressions.

Star giggled awkwardly. "Oops..."

Coughing, Mr. Diaz bent down and scooped one of the puppies up. He tickled it. "Well either way, laser beams or not! They are really cute." He laughed until one of the beams hit him in the eye. "Aye! my eye!" He clutched one hand over his right eye and let the puppy go back to its brothers and sisters.

Getting the hint, The Diaz matriarch clapped her hands together. "Marco! Why don't you go show Star her new room!" She sent her daughter a bright million watt smile that would quell any rejections she might have.

With a load groan, Marco grabbed Star's trunk, said person herself and dragged them up the stairs.

"Yay!~" Star ran ahead of Marco.

Both teens were oblivious to the eyes watching them outside the window.

Marco grunted as she dragged the trunk to the guest bedroom. "Here's your new room!" Her voice went a higher pitch than normal. She yelped in pain and dragged her foor out from under the trunk. She glared heavily at Star.

"Hmm~ Okay... I can work with this..." She chewed on her wand as she checked out her new digs. "Eureka! I got it!" Her wand began to glow bright pink.

Marco's eye's widened and she gulped. "Oh boy... I don't like where this is going..."

"Sparkle Glitter Bomb Expand!"

The whole room turned bright pink. Outside of the house, part of the roof blew off and a castle tower top emerged from the hole.

Back within the house, Marco's mouth dropped open in awe. Her gave trailed up the spiraling staircase to the multiple windows, to the jewels embedded within the ceiling. "Whoa..."

Star giggled and jumped on top of her bed. "Ah!~ That's better!~"

Marco gasped and ran for the bed, removing the mace that was bouncing along as a result of Star's jumps. She sighed i relief. 'That was a close one...' She eyed star in slight envy. "I wish I had a room this cool!"

Star locked onto her words like a predator would with its prey. "Oh! You do?~" Her eyes sparkled in delight and she spring from her bed to her new Earth friend's room.

She nodded. "Yeah, I sure..." She felt a rush of wind smack her in the face. "WAIT WHAT?!" She noticed the princess had fled from the room, and groaned. There was only one place she would be heading. She turned around and ran out of the room towards her own. 'Please don't let her destroy my room... PLEASE DON'T LET HER DESTROY MY ROOM!' She slid on the floor and stopped in front of her open room just in time to see Star chant a magic spell.

"Mystic Room Suck Transform!" Pink spiders exploded from her wand and disappeared quickly. A giant black hole appeared in the wooden floor of Marcellia's room and begun sucking in everything in its sight.

She gaped from behind Star. She watched helplessly as her karate championship trophies, along with her computer, karate practice area, and all her favorite band posters got sucked into the hole.

"Whoa!" Star gripped tightly to the wooden frame as the black hole tried pulling her in.

Both she and Marcellia screamed in fright, and managed to close the door before they got sucked in.

The Princess sighed in relief, while Marcellia stood trembling in anger.

"SUCK?! ARE YOU SERIOUS? SUCK?! WHY WAS THE WORD SUCK IN THAT SPELL?!" She growled in anger as she kicked the laser puppies off of her gently. Her hands clenched and unclenched in a furious rage. She turned her glare towards the guilty looking Mewni Princess.

Star fidgeted and stomped in place while trying her hardest to avoid the other females wrathful gaze. "I don't know! It just came out that way!" She bit her lip as Marcellia banged her head roughly against the door to her once decorated room. "I'm sorry Marcellia!" The disgruntled teenager glanced around in a frenzy while trying to think of something that would cheer the distressed female out. "Umm... umm.. Oh! I know! How about a little sunshine to brighten your day!" She used her wand and a sun appeared above Marcellia. Star's smile immediately fell as it transformed into a rain cloud.

She groaned in defeat. 'Great. Not only are my pants incinerated from the puppies, now I'm soaking wet... AND IT'S NOT EVEN NATURAL!' Banging her head against her door once again, she wondered why the universe hated her. She turned around and pulled her hair harshly. "I CAN'T TAKE ANYMORE OF THIS! IF YOU'RE MOVING IN I'M MOVING OUT!" She trudged towards the stairs, only to slip backwards and fall out of the open window due to the slippery floor. "SON OF A-!"

Star gasped and ran towards the window, "Are you ok?!" She looked down worriedly at her fallen housemate.

Marcellia twitched on the floor. Her limbs angled oddly. She glared harshly at the blonde. "Oh I'm just peachy Star!" She yanked her arm up and bit back a cry. "Luckily the cactuses broke my fall!" She sat up and hissed in pain. She pulled a needle out of her cheek, neck and leg. "Stupid...magical...cactuses!" she grumbled under her breath as she stood up.

The Mewni princess bit her lip and forced a small smile. "Do you need any help?"

"NO! I'm perfectly fine! Thank you very muc-ow!" She kicked a cactus piece off her un-shoed foot. "Just please! For the love of all that is holy, leave me alone!" She turned away from her home and limped away.

Star reached out the window, but quickly pulled her arm back in. "Uhh!" She reached out again. "Umm.." She sighed and pulled her arm in again. "Time to go apologize and fix things." She turned away from the window and headed out.

The drenched teenage girl stood outside the Stop and Slurp. She disdainfully chewed on her candy bar and sighed heavily. She perked up when she saw a man heading towards her. "Here he comes... Hey sir! Do me a solid and refill this for me?!" She reached out with the cup; however the guy quickly retreated inside. She stomped in the same place angrily. "They won't let me back inside because I'm soggy!" In the deepest recesses of her mind, she knew she looked like a crazy person, but she just couldn't find it in herself to care at the moment. Her attention snapped back to the doors as a mother and her child exited. "Did you bring me my refill?"

The mother gasped and quickly escorted her child away from the crazy drenched teenager. "Don't make eye contact."

Marcellia glared at the other candy bar in her hand and promptly stuffed it and the rest of her drink down her throat. "NOMNOMNOM!" She didn't know why she shouted it, but she did. "You come to my house! You bring toilet paper!" She turned around and jumped back in fright, effectively dropping her candy bar and drink. "WHOA!" She got into a defensive position, only to glare harshly when she realized Star was standing there. "What are you doing here?"

Star looked at her feet guiltily and then back up to the crazy girl. Using her wand, she transformed the rain cloud to a butterfly. "Look, I'm sorry. I didn't get a choice about coming here to Earth, and you didn't get a choice about having to deal with me..." She trailed off and bit her and.

The girl's angry glare melted right off her face, into one of understanding and realization.

"I'll...", she trailed off, "I'll find another family to live with." Her eyes stared sadly at Marcellia, and the drenched girl realized she had been ridiculously harsh on the girl.

She looked at the girl, but her eyes locked onto something behind her. Her breath hitched in fright and she took a step back. Her eyes dilated to the size of dinner plates. "U-uh. St-St-Star..." She pointed behind the blonde.

Star turned around and gasped in surprise.

A hoard of monsters was standing behind them.

A short green bird? with a cow skull on its head spoke up in a taunting manner. "Star Butterfly! At last I found you!" He clenched his little green fist at them.

"Ludo! How did you know I was here?!" She took on a defensive position.

Ludo snorted and chuckled evilly. "Wouldn't you like to know?"

Star leaned forward, her wand grasped tightly between her hands. "Yes, That's why I asked."

Ludo laughed and threw his hand back. "Funny story actually, Bullfrog...Wait a minute!I don't have to tell you anything! Attack my monsters!"

The group of monsters lunged towards Star, who was ready for battle, however; something unexpected happened.

Seeing that her charge was in danger, Marcellia leaped in front of Star into a karate position. She glared harshly at the incoming group. "HIYYAH!" She roughly punched the cow like monster in the gut, spun around and did it again.

The monster wobbled, but came back for more.

She jumped up and extended her leg out, only to bring it down roughly on top of its head, effectively knocking it to the concrete sidewalk unconscious. She landed in a lunge half on top of the unconscious monster.

Star's eye's sparkled in awe and excitement. "You can fight?!"

Marcellia grinned and and stared at her clenched fists in front of her face. She smirked at the awed princess. "It's called... karate!" She chopped the bear like monster with a horn on the back.

Star leapt over Marcellia in front of a blue monster with F like horns on each side of its head. She jumped up as it swing its wooden hammer down on her. Rearing her leg back, she spun around and kicked the monster in the stomach hard. "YAH!" He lost his grip on his hammer, and it ended up smashing him on the head. Star giggled.

Marcellia flew by Star, leg fully extended, arm extended ready for a punch, and screeched madly "KAY RAH TAEEEE HAAHHHHH!"

Ludo gasped, and hopped onto of Bullfrog. "You said she was unguarded!" He gripped his monster's shirt tightly, while Bullfrog shrugged his shoulders in an 'I don't know' gesture.

"Hiiiiyah!" Marcellia karate chopped a two headed monster in between its heads;however that hd no effect. ignoring the taunting from said monster, she immediately began moving her hand smacking their heads like it was a practice punch pole.

Star jumped from off the roof of a car and jumped onto the back of a giraffe monster's neck. She slid around it till she was behind it. Releasing her grip she jumped up and aimed her wand at it. "Rainbow Fist Punch!"

The giraffe went flying into a car.

Marcellia jumped back to the door of the car the giraffe was in, and merely opened it.

The monster's neck extended out from the car, and collided with the monster she had been previously fighting, sending it flying away.

She smiled proudly, and found herself reunited with a serious looking Star. "Yah!" She punched the same two headed monster from before, as she covered Star's back with her own.

Star smiled widely, understanding what was going on. She quickly blasted Bullfrog into a pole.

Ludo shoved the monster and groaned. "You're embarrassing me! Get up!"

Bullfrog ripped the pole out of the ground and charged towards the two.

"Jelly Bean Hallucination Mist!"

Bullfrog stared at his hands in shock as his own face appeared on them. "Whoa." Jellybeans rained down around him. "What is happening?"

Star and Marcellia stared at each other and back to the battlefield with a huge smile on their faces. They were roughly shoved to the floor by a chicken and a monster with three eyes.

"For the love of! HIYAH!" Marcellia jumped up and kicked them both away from her and Star. She snickered, as Star brought up her wand. Those monsters were in for a major bruising.

"Mega... Narwhal... BLAST!" Narwhals shout out of Star's wand and crushed the two monsters.

Ludo stared helplessly as all his monsters lay on the floor defeated.

"You want some of this Luuuuuudo?~" Star emphasized the u's. She smirked smugly down at the little monster.

He sighed. "No..." He pulled out his Dimensional Scissors and sliced open the portal home. "You see you morons! This is what happens when you don't exercise! Your muscles get weak! Come on! Back in the portal! back in the portal! You even retreat like losers!" Once all the monsters were in the portal, Ludo reared his head out again. "I'll get you Star B-UGH!" The portal closed around his quickly was yanked back by his monsters. His skull helmet fella to the floor.

Marcellia stared blankly ahead for a couple of minutes before releasing a squeal. "THAT WAS AMAZING! YOU WERE AMAZING! WE WERE AMAZING!" She threw her hands up in excitement.

Star shrugged. "Yeah, I guess we were." She stared at Marco for a bit before sighing and frowning. "Well... I guess I better go and pack my bags..." She started walking away from the girl.

Marcellia squeaked, and jolted back in shock. Quickly she jogged up to Star and put her hand on the other's shoulder. "Wait! I don't want you to go!" She smiled widely at Star. "I want you to stay with us, and I apologize for my behavior earlier..."

Star reared around, her eye's sparkling like a pile of glitter. "Really?" She squealed and wrapped her arms around Marcellia. "Hugs!~"

She smiled and hugged her back. Quickly separating from her she jumped around, kicking and punching air. "Is there going to be monsters surrounding us all the time? Showing up to fight?"

Star nodded. "Yuuuup! Probably!~"

She squealed in delight. "Alright! Sounds so dangerous! Whoa!" She reached out and grabbed Star's shoulder before she stepped into the street. "Let's cross at the light."

She and Star started walking towards their home.

"Ok Wild Amazon Marcellia." Star joked.

Marcellia threw her arm over Star's shoulder playfully. "Marco. You can call me Marco. It's a lot easier than Marcellia."

Star giggled and grasped Marco's hand. "Aye-Aye Marco."

As they walked home in the moonlight, Marco couldn't help but think, that having Star as a friend wouldn't be so bad.

A leftover narwhal from the battle, fell and smacked Marco in the head. She stumbled backwards and tripped over a box, and into a pile of smelly garbage.

"Whoopsie!~ You ok Marco?" Star asked.

A rotten banana peel slid down her face. "Yeah, I'm peachy Star." 'Then again... Maybe not...'


Annnd~! Chapter One is done!~ I hope you guys enjoyed!~ Please Review and look out for more!~

Coming next time: MAGICAL FLYING PRINCESS PONY HEAD!~