HAPPY NEW YEAR! And with a new year, comes a new crossover. My fourth crossover is here, and the poll winner is...The Familiar Of Zero. But this time, Saito will remain with Louis, and our favorite hero will be with a certain redhead rival of Louise's. And before you read this, you should know that this story takes place between Ben 10: Alien Force and Ben 10: Ultimate Alien, and Julie doesn't exist here, so Ship is Ben's pet who helps the Tennyson family around the house, and Ben is 15 years old...for now.

Chapter 1: The Contract

It's been a week since Ben obtained the Ultimatrix, cured Kevin, and defeated Vilgax and Albedo. When Ben, Gwen, Kevin and Max returned to shore, Kevin wanted to see if he can still transform his limbs into weapons, so he absorbed the road and turned his hand into a mace. The others were surprised about Kevin's Armored Limb Transformation, also known as A.L.T. In the week there was no crime, and no excuse for Ben to test out his new Ultimatrix, until now.

(Bellwood)

Ben Tennyson is currently laying on his bed bored, because he already beaten all of his Sumo Slammer games during the crime-free week. Not to mention that tomorrow is the last day of school before summer, so it won't matter if he goes or not.

"Sometimes I wish something would happen because crime-free days are BORING." said Ben. Suddenly, a red portal appeared next to him before he jumped and readied the Ultimatrix.

"A Null Void Portal? How did it get here?" asked Ben to no one in particular. After a few seconds, Ben noticed one difference.

'The portal's not swirling red and white, so it can't be a Null Void Portal. If it's not a Null Void Portal, then where does it lead to?' thought Ben as he carefully touches it. When he touched it with his finger, he felt warm inside. He also heard a chant from the portal. Before he could pull the finger back, he got sucked in.

(Meanwhile, in Tristain Academy Field)

Most of the students have summoned their familiars, except for 2 archrivals. Louise is currently waiting for while Kirche is fighting through the crowd of lover boys. When she got through the crowd, she noticed that Louise hasn't summoned her familiar either.

"Alright, since you are the last two students who haven't summoned Familiars yet, you have to do it at the same time." said . The two girls glared at each other so hard that sparks are visible between the glare.

"Yes, sir." said Louise and Kirche at the same time as they took out their wands.

"My servant that exist somewhere in this universe, my divine, beautiful, and powerful familiar, I wish and assert from the bottom of my heart, answer my guidance!" chanted Louise and Kirche simultaneously as they twirl their wands in the air and swung it in front of them. Unfortunately, there was an explosion due to Louise's explosion spells, so everyone has to wait for the smoke screen to clear.

(Above the Tristain Academy Field)

"AAAAAAAAAHHHHHH!" screamed Ben and a black spiky haired teenage boy with a blue hoodie with a white stripe across the upper part, black jeans and blue sneakers. His eyes are closed, so his eye color is currently unknown. Ben activates the Ultimatrix with a happy sigh.

"Finally, a good reason to go HERO!" shouted Ben as he slams the Ultimatrix. A green flash occurred, and a yellow ball with black stripes took his place.

"Cannonbolt? I wanted Goop.(sighs) Guess the Ultimatrix gives me the wrong alien sometimes also." complained Cannonbolt as he falls to the ground. He fell in a smokescreen, so no one saw him transform back. He stands up and tries to see through the smoke. The smoke clears and he sees multiple teenagers with black robes and white shirts. He guessed that they're students, but for an unknown school. As soon as everyone saw him and the other boy, they gasped.

"A human?" gasped a gray-eyed blonde male.

'What do they have against humans? They're humans too.' asked Ben in his thoughts. He noticed that everyone's attention is directed to a lightly red-eyed pink haired girl in front of the other teenage boy on his right side. He also noticed a brightly brown-eyed redhead girl with dark skin in front of him, and couldn't help but think of one thing.

'She's got to be the most attractive girl in the universe.' thought Ben as he notices the redhead eying him with a light blush.

'He's cute. At least my familiar is more attractive than that Zero's familiar.' thought the redhead. Their gaze got interrupted when they heard murmurs.

"Looks like Louise the Zero got a peasant as a familiar." insulted a male voice in the crowd as the rest laughed. Ben clenched his fists after hearing insults. The insults could've went on if he hadn't heard a groan from the teenage boy. The pink haired girl approached him.

"Who are you?" asked the pink haired girl. The boy opened his eyes to reveal silver eyes as soon as he sat up.

"Nani datte? Koko wa doko?" asked the black haired teenage boy.

"He doesn't understand our language?" asked the redhead with her arms crossed.

'Maybe I can use the Ultimatrix's Universal Translator setting to translate him.' thought Ben as he makes sure no one is paying attention to him. Before he could, the boy talked in English.

"Sorry about the language mix-up. I didn't know I was outside my home." apologized the boy as he scratches the back of his head sheepishly. Ben sighed in relief, happy that the boy is bilingual.

"Why is everyone wearing the same clothing except for him?" asked the boy as he points at Ben. Ben face palmed, knowing he took the crowd's attention.

"He's right. Kirche summoned a peasant too." said a different male voice in the crowd.

"At least he's in better shape than Louise's familiar." insulted/complimented a different male voice.

"Ah-hem." fake coughed an incompletely bald blue-eyed man with glasses holding a brown staff with red stripes.

"Shouldn't you two finish the ritual?" asked the incompletely bald man.

"Why should I do it with a peasant familiar?" asked the pink haired girl.

"If you don't, you'll get immediately expelled." said the incompletely bald man, which confirms Ben's unknown school theory.

"I have no problem with this." commented the redhead. The crowd gasped after hearing this.

"But introductions are in order." added the redhead as she approaches Ben with a light blush.

"My name is Kirche Augusta Frederica von Anhalt Zerbst." introduced Kirche as she continues approaching Ben.

"My name is Ben Tennyson." introduced Ben as he offers his hand. Kirche takes the hand and shakes it. After she finished the handshake, she went up to Ben and kissed him on the lips. Ben got wide-eyed but closed his eyes and kissed back.

(During that time, the scene when Louise kisses Saito)

Kirche pulled back from the kiss with a smile on her face.

"Why did you kiss me?"asked Ben before a green glow came from Ben's right hand(since Saito's rune hand is left, and Ben always wears his jacket, I decided to make Ben's right hand the rune hand.) and a burning sensation came from it. Ben shut his eyes and gritted his teeth in pain as he kneels down and holds his wrist in a failed attempt to stop the pain. It took a lot of willpower, but Ben managed to stand up and endure the pain. The pain lasted for 1 minute until the glow stopped and strange runes appeared on Ben's right hand. Unlike Saito, Ben is completely conscious and standing with a confused look on his face as he looks at the runes on his right hand.

"Alright, everyone. Class is over for the day." stated Mr. Colbert as everyone leaves to their rooms, along with Louise dragging Saito. Kirche and Ben are the only ones who remained outside. Kirche turned to Ben while looking down and fiddling with her fingers.

"Guess I owe you an explanation, huh?" asked Kirche. Ben nodded and Kirche motioned him to follow her.

(Kirche's room)

Kirche opened the door to her room, and let Ben in.

"Nice room." complimented Ben as Kirche goes to sit on the side of her bed. Kirche motions him to sit next to her. Ben sits in her left with a light blush.

"Where should I start?" asked Kirche.

"To be honest, I'm curious about these runes on my hand." answered Ben as he shows the runes on his right hand.

"I'll start from how you got here to get to that. The reason you got here is because of a summoning I performed. Every second year student has to perform a summoning the first day of the second year. The summoning is for calling familiars. which means..."started Kirche but Ben interrupted.

"Slave or protector in other words." interrupted Ben. Kirche stared at him wide-eyed.

"My cousin Gwen told me about familiars. Also, one of my enemies have a familiar." informed Ben.

"Continue, please." said Ben as soon as Kirche recovers from her shocked state.

"The runes on your hand means fire, which means you have new fire powers." explained Kirche.

"Pyro kinesis?" asked Ben.

"What's pyro kinesis?" asked Kirche. Ben face palmed himself, forgetting that his world is more advanced than this world.

"Pyro kinesis is an ability to have control over fire. For example, you use magic to control fire, am I correct?" guessed Ben. Kirche nodded in response.

"Using magic to control fire is a form of pyro kinesis. There are a few other forms of pyro kinesis, such as natural pyro kinesis, which is the form of pyro kinesis that is connected to the blood of various living beings." explained Ben.

"How do you know about that stuff?" asked Kirche curiously.

"The world I'm from is highly advanced in technology. Your world is highly advanced in magic. I'm pretty sure that's how."answered Ben before a thought came into his mind.

"Wait, you said I have pyro kinesis, right?"asked Ben. Kirche nodded after understanding all the information. Ben smirks and stands up to approach the window. He opens it and concentrates on his left palm. Nothing happened until a green fireball appeared on the palm. He threw it out the window and turned to see Kirche with a shocked look on her face.

"Surprised?" asked Ben.

"How was that fireball green?" asked Kirche as soon as she recovered from her shock.

"To be honest, I think it's cause of my life force." answered Ben.

"What does your life force have to do with the color?" asked Kirche.

"It's a theory, but I think multiple life forces have different colors. Mine is green, which could explain the fireball." answered Ben.

"So am I supposed to protect you or do what you say?" asked Ben. Kirche puts her hand under her chin in a thinking pose.

"I prefer the first option." answered Kirche. Ben sighed in relief, glad that he won't be a slave.

"Mind if I check out the place? I need to know more about this place so I don't get lost." said Ben.

"No, I'll give you a tour." insisted Kirche as she stands up. Before they could exit the room, a hazel-eyed brunette with a purple cloak called Kirche out from the window.

"Kirche!" shouted the hazel eyed brunette, also known as...

"Styx? What are you doing here?" asked Kirche. Styx answered by waving his wand, and suddenly, water appeared around Kirche and froze her body, leaving her head unfrozen. Ben gasped at this action, and Kirche somehow levitated to Styx.

"You know I'm here for you, Kirche. And I'm taking you by force!" yelled Styx. Kirche is now out the window heading to Styx. Styx leaned his head in for a kiss, but instead, he got a face full of green fire. Styx fainted and Kirche started falling to the ground. Ben went to the window and mentally cursed himself for shooting Styx down late. Ben jumped out the window and dived down to Kirche.

"What are you doing? You'll die too." warned Kirche.

"Neither of us will." smirked Ben. Before Kirche could ask what he meant, he slammed the Ultimatrix and a green flash occurred. Kirche closed her eyes until the flash died down. She gasped at what she saw. Falling in Ben's place is a green humanoid blob with green eyes, a U.F.O device above his head, and a green hourglass symbol on it's chest.

"GOOP!" shouted the Polymorph in a high pitched voice. After recovering from her shock, Kirche realized that she is close to the ground. She closed her eyes to prepare for her doom, but nothing came. When she opened her eyes, she found her frozen body being carried by Goop. She couldn't help but ask one question that was on her mind.

"Ben? Is that you?" asked Kirche. Goop's head formed in front of Kirche's head, and if Goop could smirk, he would.

"Yeah. it's me. I owe you an explanation do I?" asked Goop. Kirche nodded and Goop took her into her room. Goop set Kirche down and uncovered the ice and appeared in front of Kirche with his finger under his would-be chin in a thinking pose.

"I wonder." said Goop lowly as he aimed his palm at Kirche and blasted green fire at the ice. He continued for a few minutes until Kirche is completely unfrozen. Goop slammed the hourglass symbol on his chest and changed back to Ben. Before he could explain, Kirche put her finger on his mouth.

"Explain after I change to my pajamas." said Kirche as she went to her private bathroom with clothes on her shoulders. Ben stared out the window and noticed the two moons in the sky and shrugged.

"Not the weirdest thing I've seen." commented Ben as he turns...only to see Kirche in nearly clear purple pajamas. Ben would have a nosebleed if his willpower hadn't helped him control his hormones. Kirche blushed when she saw Ben's reaction.

"Thanks for saving me. I can't believe you risked your life for me." thanked Kirche as she sits on her bed.

"You're welcome. That's what friends are for." replied Ben with a blush.

"We're friends?" asked Kirche with a light blush.

"Anything wrong with that?" asked Ben. Kirche replayed what she said in her mind and realized he took it the wrong way.

"Nothing's wrong with that. It's just(sighs) it's just that all of the male students here are only interested in my body." said Kirche with her head down.

"I know what that's like." said Ben. Kirche lifted her head and stared at Ben in shock.

"You do?" asked Kirche. Ben nodded before speaking.

"When I was 10, my first crush was on a girl named Kai Green. My grandfather knows her grandpa from the military. When I revealed my powers and saved our grandpas, her grandpa told her about my powers. I saved our grandpas from a werewolf alien, I'll explain what aliens are later, and that same werewolf scratched my power source and slowly turned me into his species. When I completed the transformation and changed back, I used a different form to beat him and save everyone from a volcano eruption. Before me, Gwen and Grandpa left, Kai told me that she only likes my werewolf alien form and broke my heart. It took a week to get over it, but I've learned a valuable lesson that day, and it's to never like a girl before you know her." explained Ben before he took a deep breath. Kirche failed to hold back the tears and cried in her hands.

"That's horrible. Having your heart broken at such a young age, and having to learn your lesson the hard way." cried Kirche. She cried for 20 minutes until she swept the remaining tears from her eyes.

"I'm sorry for bringing a bad memory. I had no idea." apologized Kirche as she stands up and bows in respect.

"You don't have to do that. You suffered more than me, seeing how many guys want you for your body." assured Ben.

"Then why am I your friend?" asked Kirche.

"Your actions. You wanted me as a protector rather than a slave, you insisted on giving me the tour around the academy, and you let us do introductions properly before finishing the summoning. Those actions define who you are, and your actions(blushes)make you a nice person." answered Ben. Kirche blushed and hugged Ben, making Ben blush because of the close contact, but Ben hugged back.

"Thank you." thanked Kirche.

"For what?" asked Ben as Kirche pulls back from the hug with a smile on her face.

"For being my first male friend." answered Kirche.

"Really?" asked Ben.

"Yes. The only other friend I have is Tabitha. I couldn't make more female friends because they're either intimidated or jealous of my body." answered Kirche.

"Did you try to wear...less revealing clothes?" asked Ben with a blush. Kirche blushed while answering.

"I actually don't have less revealing clothes. The reason I don't is because my father forbidden me to wear anything that covers my...assets. He once tried to engage me to a man who is a decade older than me." answered Kirche. Ben shuddered after hearing what her father tried to do to her.

"You poor girl." said Ben.

"But my mother cancelled the engagement because she knew how uncomfortable I was, and she once said to me 'True love doesn't depend on what you are, it depends on who you are.'" added Kirche.

"Your mother sounds wise." complimented Ben.

"Thanks, now weren't you going to explain about your powers?" asked Kirche. Ben became wide-eyed, forgetting about the explanation completely.

"Alright." sighed Ben as he pulls up his left sleeve, revealing the Ultimatrix.

"This is a device called the Ultimatrix. It allows me to transform into a variety of aliens, beings from other planets. The one I used to save you is a Polymorph, or as I like to name it Goop. His body can take on multiple shapes, but he needs the Anti-Gravity Disk to be able to do that." explained Ben. Kirche stares at him wide-eyed. Ben sighs and turned his head the other way.

"I knew you wouldn't believe me." said Ben. Kirche recovers from her shock and tilted her head forward.

"It's not that I don't believe you. It's just amazing that a device can do that." commented Kirche. Ben sighed in relief before yawning.

"It's really late. I need to get some sleep." yawned Ben.

"Sleep with me." said Kirche quietly. Unfortunately for her, Ben heard her.

"What do you say?" asked Ben.

"You could sleep with me(deep blushed) if you want." suggested Kirche. Ben blushed before looking around the room. He sees that there is only one bed, and it's the perfect size for both Kirche and Ben. Ben sighs in defeat, knowing she's trying to make him comfortable.

"Okay, I'll(blush)sleep with you." said Ben. Kirche smiled and hugged Ben, also tackling him to the bed, putting them in an awkward position. Kirche noticed this and sat up, blushing wildly.

"Sorry about that. I didn't mean for this to get awkward." apologized Kirche.

"No problem." said Ben, who is also blushing wildly. He took off his jacket and shoes and went to set them on Kirche's dresser. Ben turned to see Kirche laying down on the bed with the blanket over her. Ben smiled and went to lay next to her and go to sleep.

Oh, man. This is the first Ben 10 and Familiar of Zero crossover that Ben is Kirche's Familiar, and includes the Ultimatrix. Tell me what you think in the reviews, and if this isn't the crossover you voted for, don't worry. I plan to make a new crossover every month. You can say it's my New Year's Resolution. Anyway, see you next time.