Ch.1: Mio and Maria meet Ben Tennyson
In Tokyo, Japan, two girls were running as fast as they could from several shadow demons. One of the girls had long, crimson hair and pink eyes. She was wearing a purple blouse, blue skirt and red shoes. This was Mio Naruse.
The other girl had long silver hair and slit purple eyes. She was wearing a black leather revealing outfit, white leggings with light pink horizontal stripes, and black boots. She also had small black wings located near her waist and a long tail. This was Maria Naruse.
"They're coming in," shouted Mio.
"We take one down, eight more appear in its place," said Maria as she punched one shadow demon and more appeared in its place. "We can't keep this up for much longer."
"You won't have to," said a voice and the two girls looked behind to see a man with gray eyes, black hair with gray on the sides and wrinkles on his face. He was wearing a white lab coat with brown and black pouches and gold trim, and underneath, he wore a black turtleneck with a white scarf, and his brown vest had gold buttons and pouches. He had a pair of goggles around his neck, a metal gauntlet on his right hand and a fingerless glove on his left. His black pants had brown kneepads, and he wore a pair of brown boots with gold straps. This was Professor Paradox. "It looks like I've arrived just in time."
Paradox pressed a button on his gauntlet and all time stopped around him and the two girls.
"What happened," asked Mio.
"I stopped time. I'm here to offer you my help with your current situation," said Paradox.
"Really, and who are you," asked Maria.
"I'm Professor Paradox and I'm a time walker, Miss Maria Naruse," said Paradox, shocking the girls.
"How did you know my name," asked Maria with a glare.
"I know a lot of things, including the situation you two are in," said Paradox.
"Oh yeah? And how are you supposed to help us," asked Mio with her own glare. "You better tell us fast or I'll kill you a hundred times!"
"Easy, I can take you to someone, who can help you and keep you safe," said Paradox.
"And how can we know this isn't some sort of a trick," asked Mio.
"I can answer that question if you decide to come. We don't want to inform your friend over there," said Paradox as he pointed at a figure behind the girls.
Mio and Maria turned around and saw a man with a white mask standing on a rooftop.
"What should we do, Mio," whispered Maria.
"I'm afraid we don't have much of a choice, said Mio before turning back to Paradox. "Okay, we'll come with you, but this better not be a trick or I'll kill you a hundred times."
"Splendid! Let's get going then," said Paradox as he opened another portal and the girls slowly made their way in, followed by the professor, and time started again.
Inside the portal, the girls could see nothing but deep space. Maria was now wearing a black dress that has white frills most of the time and what seemed to be like a functional keyhole on her collar, black leggings, and boots that have a purple hearts on them.
"Where are we," asked Mio.
"Somewhere I can explain things to you," said Professor Paradox.
"Is this where we're gonna meet the one you said that can help us," asked Mio.
"No. He's currently in his world, but we'll go there shortly. First, there are some things I need to tell you about," said Professor Paradox.
"And what could these things be," asked Maria.
"How much do you know about the Multiverse theory," asked Professor Paradox.
"I've heard about it. The Universe is a one giant tree and the branches are the many different possibilities," said Maria.
"That is an excellent example," said Professor Paradox in joy. "Now, you two may exist in one Universe, but you don't in another. That's the case with the boy I'll take you in a few short minutes. Tell me, have you heard of Ben Tennyson?"
"Can't say we have," said Mio and Maria nodded in agreement.
"Who is Ben Tennyson," asked Maria.
"In his own Universe, he's a world famous superhero, but he's known beyond Earth as well, and the wielder of the Omnitrix," said Professor Paradox.
"Okay, you lost me at the end. What's an Omnitrix," asked Mio.
"The Omnitrix allows its wielder to transform into many different alien species," said Paradox. "In Ben's case, he uses it to fight bad guys and save the world, most of the time."
"And just what kind of powers does he have," asked Mio.
"The right question is what powers he doesn't have," said Paradox as he showed the girls some of Ben's aliens. "These are some of the aliens he can transform into."
"I don't know why, but I get the feeling he gave them names," said Mio.
"He most definitely did," said Paradox. "He calls these ones Shocksquatch, Jetray, Wildvine, AmpFibian, Stinkfly, Heatblast, Ripjaws, Humungousaur, XLR8, Big Chill, Jury Rigg, Armodrillo, Echo Echo, Lodestar and ChamAlien."
"He's got an alien dinosaur," said Maria in shock before looking at Wildvine with a smirk. "I already know for what I'm gonna use those vines."
"Yes, he can change his shape and size depending on which alien he transforms into, and up until a few weeks ago, he was able to evolve some of his aliens into their ultimate forms," said Paradox as he showed the girls Ultimate Humungousaur, Ultimate Big Chill and Ultimate Echo Echo. "My question now is, are you ready to meet him?"
"I don't know. What if someone who's after us finds us and gets Ben," said Mio in concern.
"That won't happen. Once we arrive, I'll erase any traces of you. People will still know about you, but no one will know where you are and how to get to you," said Paradox. "Also, Ben has made several enemies over the years, so don't be surprised if you have to fight some of them."
"I think we're okay with that," said Mio and Maria nodded.
"I'm glad to hear it," said Paradox. "Just one more thing before we go. Will you be alright if you become his little sisters?"
"I don't see a problem. We won't be hunted and we'll have a family," said Maria and Mio nodded in agreement. "But what about his parents?"
"Don't worry about it. His parents are aware of his superhero life and will understand the situation," said Paradox, calming the girls down.
"In that case, we're ready, but I have a condition," said Mio. "A demon lord, called Zolgear, killed my foster parents and I want to avenge them. When we're ready, I want you to bring us back so I can take him down, permanently."
"That is understandable. Very well, I'll grant your wish," said Paradox.
"Then let's go meet our new brother," said Maria and Paradox smiled before opening up a portal and the three entered it.
Meanwhile, in Bellwood it was nighttime and Ben Tennyson was having dinner with his parents, Gwen and Kevin when a portal opened in the kitchen. Ben's parents backed up while Gwen's hands glowed pink, Kevin absorbed the chair and Ben transformed into his Polymorph form he called Goop after selecting XLR8.
"Does Goop sound like XLR8 to you," Goop complained to the Omnitrix.
"Look on the bright side, it could've turn you into Way Big," said Kevin jokingly.
"Guys, focus," said Gwen with a glare at her cousin and boyfriend.
The three got ready to attack before Professor Paradox came out of the portal.
"Professor Paradox? What are you doing here," asked Gwen.
"Dude, next time give me a call before you enter my house," said Goop.
"I'm sorry for the intrusion, but I have an appointment for Ben. This involves his parents as well," said Paradox.
"Okay, but don't talk in riddles," said Goop.
"Ben, who's your friend," asked Carl as he and Sandra approached the man.
"That's Professor Paradox. He's a time walker," said Goop before turning to the professor. "So, what do you need my parents and I for?"
"Let me tell your sisters to come out first," said Paradox, shocking everyone before Mio and Maria came out of the portal.
"Your sisters look nice," said Kevin, earning himself an elbow to the ribs by Gwen.
"This is literally the first time I've seen these girls. How can they be my sisters," asked Goop.
"That's part of your job," said Paradox. "These are Mio and Maria, and they're from an alternate Universe. They were in danger when I fetched them."
"So you basically kidnapped them," asked Gwen.
"They were by themselves and were chased by Shadow demons," said Paradox. "Mio here is the daughter of a former demon lord and Maria is her guardian. Unfortunately, Mio is being hunted by another demon lord, who wants the power she has inherited from her father for himself."
"Basically, you want me to keep a demon lord's daughter out of enemy hands," said Goop, earning a nod from Paradox.
"If Zolgear gets her power, he'll take over the demon realm," said Maria.
"That demon already killed my foster parents," said Mio with a sob.
"I still have –," started Goop, but stopped when his parents ran up to Mio and hugged her.
"Oh, you poor child," said Sandra as she stroke Mio's hair. "I give you my word that you and Maria will be safe here."
"That's right! Besides, we've always wanted to have a daughter and now we have two," said Carl before turning to his son. "Ben, you will keep Mio and Maria safe and look after them like a big brother!"
Wait, you two are okay with this," asked Goop in shock before the Omnitrix timed out, and Mio and Maria looked at the 16–year–old boy with pleading eyes, causing Ben to sigh. "Okay, I'll take care of them. But where are they gonna stay?"
"Tomorrow we'll clean up one of the guest rooms. As for tonight, they can stay in your room," said Sandra before turning to Paradox. "We'll help Ben anyway possible."
"I'm glad to hear it. Well, my work here is done. See you all soon," said Paradox before disappearing.
"Ben, show your sisters the way to your room," said Carl.
"Okay, but in what are they supposed to wear for the night? I'm sure they wouldn't want to sleep in their day clothes," said Ben.
"You'll figure something out. Tomorrow, we'll go shopping for some clothes," said Sandra in happiness.
"I'll go get sleeping bags for the girls," said Carl.
"I better get going. I've got bags to pack up," said Gwen.
"I still can't believe you're leaving for collage," said Ben.
"Don't worry, doofus. It's not the end of the world," said Gwen.
"I know, but it won't be the same without you guys," said Ben.
"Chill out, my man. Besides, you've got two demon sisters with you now," said Kevin.
"Yeah, but know that you guys are irreplaceable," said Ben.
"Okay, this nice talking is making me sick so I'll be at the car," said Kevin before exiting the house.
"I don't know what I'm gonna do with him," said Gwen with a chuckle before looking at her cousin. "You know I'll miss you, Ben. You're my favorite cousin and try not to give your sisters a hard time."
"I'm gonna miss you, too," said Ben as the two shared a hug.
"If there's time, we can hang out tomorrow. Just the two of us, what do you say," asked Gwen.
"Sure, if my dad doesn't need help in cleaning up the girls' room while they're out shopping," said Ben with a smile.
"Cool! I'll call you tomorrow to arrange something," said Gwen as she waved at Ben before leaving the house.
Ben sighed before looking at his new sisters, who were watching him curiously.
"Come on, I'll show you the way to my room," said Ben before gesturing the girls to follow him.
The next day went pretty much uneventful. Sandra, Mio and Maria went shopping; Carl cleaned up the girls' room and Ben used his Kineceleran form he called XLR8 to buy some decorations for the room, and his Sonorosian form he called Echo Echo to help Carl decorate the room. This gave him time to meet up with Gwen.
The two cousins spent most of their time at Mr. Smoothie, but their happy moment had to be cut short because of several criminals taking hostages at a nearby shopping center with Ben's mom and sisters inside it. There were around 40 men, but they were no match for the two cousins. Ben used his Merlinisapien form he called ChamAlien to sneak into the building while Gwen used her magic and karate to knock the men standing outside. Thanks to ChamAlien's camouflage and flexibility, he was able to take down the men inside, who were guarding the hostages. No one knew what happened, but Sandra quickly realized that it must've been Ben, who saved them. This was soon confirmed when the police and reporters arrived and got to see the two cousins. The people, who were held hostage swarmed the two, thanking them for saving their lives. Mio and Maria saw how much Ben was thanked and loved for. Actually, some of the people the cousins saved were aliens from different species, including a family of Gimlinopithecus with a baby. The two girls noticed that Ben stared the baby adoringly, before signing a photograph. Sandra, Mio and Maria bought enough clothes despite the chaos and went back home, and told Carl of what happened.
At sundown, Ben returned home after parting with Gwen and received thanks from his parents and sisters for saving all those people, Sandra, Mio and Maria included. At dinner, the two girls asked Ben why he acted weird around the baby Gimlinopithecus and he told everyone about his Necrofriggian babies, shocking everyone. Sandra and Carl quickly thought that Ben had hooked up with an alien girl, but he quickly calmed them down by telling them that Necrofriggians breed asexually and lay eggs once every 80 years. After dinner, Ben received a call from Gwen, telling him about Zombozo robbing a brain bank. Ben bid goodnight to his parents and surprisingly received hugs from Mio and Maria as thanks for saving them and the two girls smiled as Ben kissed their foreheads for goodnight and went after Zombozo. The girls went to their room and laid in their respective beds.
"You know, Mio. Life here is definitely going to be interesting," said Maria.
"Yeah. I'm still processing the fact that our brother is a superhero," said Mio. "I thought he'll throw us away when he learned that we're demons, but he actually accepted us."
"Yeah, but if we're going to be living together and even help each other, I think we'll need to make a pact and the only way I can think of is the Master/Servant pact magic," said Maria with a smirk.
"Do you think he'll accept? I don't want to force him into something he doesn't want to do," said Mio.
"Don't worry. You just leave everything to me. It'll be alright," said Maria with a sly smirk. "I won't stop until I get those vines all over me."
To be continued…
Hey, everybody. I'm here with another story. As you can tell, this'll be a Ben 10/The Testament of Sister New Devil crossover. I started watching this anime just 2 weeks ago and I really loved it. I'm gonna get straight to the point, Maria and Mio are my favorite characters (in that order). I noticed there are not many The Testament of Sister New Devil stories, so I decided to make one of my own. This'll basically be Ben 10: Omniverse with Mio and Maria in it, so there'll be some differences from the show:
1. The main pairing will be Ben x Mio x Maria. Sorry Ben x Kai fans.
2. There will be lemons in later chapters.
3. Mio and Maria will be joining Ben and Rook in some of their missions.
4. Some of Big Chill's kids will appear and stay with Ben.
5. Maria will do a Master/Servant pact with Ben with herself.
6. Ben will go with Mio and Maria when they return to their own Universe to deal with Zolgear. This'll most likely happen after Feedback's return.
7. There won't be many flashbacks, so some episodes will be skipped.
8. Some of the aliens, who didn't appear in Omniverse, like Jetray and ChamAlien, will appear in the story; and the aliens, who were rarely used, like Stinkfly, Lodestar and Brainstorm, will appear more regularly.
9. Being Ben's sisters means that Mio and Maria are now Max's granddaughters, Gwen and Lucy's cousins, etc.
10. Azmuth will add the evolutionary feature at some point.
Well, I hope you liked the first chapter. I'll see you all next time. Until then, have a nice day.
R&R
