Familiar of Zero Xover Ideas

ESKK: Yeah since people were doing fanfic pitches for this I figured I might as well do one also because well let's face it I have a lot of ideas that I never get onto paper. Now then let's begin shall we since this idea is one of the top possible ideas I had.

Idea 1: The Voids Key

(Start Lanes in Between)

The Lanes of Between a place that was similar to a Void but acts as rift between Worlds. This Rift only few beings can travel through them and survive in them. Among them were creatures of darkness who are able to survive is such a place with ease, others wear special armor and travel on gliders, while some build vessels capable of traversing between these worlds. Stars and rainbows passed by the visor of a dark being who wears a black and red organic suit with a cloth on a belt at his waist and a dome like helmet upon his head.

Right now this being was on his way to one world in particular to meet his other half to begin the final battle and the old coot's plans. Personally this being he thought that the weapon that his master desired was too good of a thing to just hand it over. If he could maneuver right he can have the X-Blade all to himself once he does the full merge between him and his other. Of course he Vanitas wasn't one to share and even he knew that there will be events he can't account for. But he never had the chance to explore alternatives since the master had him go from world to world releasing Unversed to not only make himself stronger but also make Terra, Aqua, and Ventus stronger.

Of course he didn't let it bother him one bit. In fact he, Vanitas had free time to kill but knew it wasn't much and much of his Unversed Spawns have been destroyed already. It was too bad since they would make perfect scouts to find any possible fall back plan to an X-Blade. As Vanitas sailed through the Lanes in Between he soon saw something in the distance as it shined brightly but was also carrying a deep void within.

"What?" He asked as that light it could be a possible rival to Ventus' maybe even a princess of light or worse a Guardian of Light. But that void it also reminded him of himself but it was devoid of anything just an abyss. "I have time to kill better check it out." Vanitas said before flying torts the light to see what created it.

(Later Vanitas)

Vanitas appeared from a Corridor as he walked out and looked around expecting to find what had created that light. Instead he found a lake, and a castle as he looked around as by the looks of it this was an estate. "Man someone is over compensating." Vanitas said as he looked around. If he had to guess these people were like a lot of the worlds he had visited, monarchy, hidden corruption, and eventually rebellions. "Now to find that light." Vanitas said as he looked around trying to find the source of that hidden light.

Vanitas looked around as he soon heard crying as he looked to a boat and saw a tarp was over it with a small lump in it, quiet possibly a child. "Great a snot nosed brat." Vanitas said as he looked closely and saw this girl she had that Void within her. "Better be worth it or I'm going to be pissed off." Vanitas said as he looked and soon felt someone approach him from behind.

"Pardon me sir but who are," A young man asked with caution but didn't get a chance to finish as soon Vanitas summoned his Keyblade and tapped the young man.

"Sleep." Vanitas said before the young man fell down limp asleep. "That should give me plenty of time to talk to the brat." Vanitas said as he walked over to the lump.

(With the lump)

Louise a young noble girl with pink hair, pink eyes, and was of the tender age of 6 was hiding in the boat. It has been sometime since she received her wand only to discover her magic resulted in nothing but explosions. She remembered the disappointed look her family gave her as she laid there. Recently she had found out she was engaged and her fiancé had arrived today. Of course Louise's first instinct was to run because she saw the young man was almost 10 years her senior which made Louise think of all those tales of the third child of nobles being married off as political pawns.

Louise didn't want that as she wanted freedom… she wanted to escape her chains and be like her mother to explore the world and make a name for herself. As Louise debated if she should push the boat to the water she soon heard a new voice that unnerved her. "Hey brat come out here." Came a rude voice as that confused Louise but made her angry since she assumed she was dealing with either her fiancé or a rude servant. When Louise looked up to peak she was wide eyed as she saw a Dark Knight there.

Louise quickly hid hoping he didn't see her as she heard the tales of Dark Knights. Practitioners of dark magic, warriors sent out to deal with heretics the church could not battle alone. These men were known to be ruthless and the type that never fail at their missions or fail to kill a heretic. Louise was worried was she a heretic, did she do something that people would send this monster to her. Maybe if she stayed quiet and wait till he wasn't looking she could escape.

"I won't tell you again you snot nosed brat come out or I'm coming for you." The young man said as Louise knew she was trapped. Maybe if she can get out she can scream and call for help hopefully she can get someone to help. Louise hesitantly left the boat as the Dark Knight looked at her.

Vanitas looked at the child as his visor reflected her face as he saw it clearly. This girl she has a lot of Void and Light within her, if he played his cards right he can get the X-Blade and not have to merge with Vanitas at all. If this became a wise investment Vanitas himself would basically have a secret apprentice but right now he should see what she can handle make her squirm a bit.

"Alright what's got you all down in the dumps here you brat." Vanitas said being rude while at the same time trying to sound like a tough yet concerned older brother. By the looks of Louise's face it worked for a bit before the girl looked at him.

"Umm who are you sir Dark Knight?" Louise asked as she looked to Vanitas.

"Vanitas, just Vanitas and you are?" Vanitas asked as he knew the girl would be suspicious of him in some way.

"Louise…" Louise introduced as Vanitas nodded.

"Alright then my time is limited so tell me what's wrong." Vanitas said as Louise looked down in shame.

"You'll just call me a failure." Louise said as Vanitas sighed.

"How can you know if you haven't told me yet?" Vanitas said as this girl clearly had powerful magic that he can tell much like Aqua. With time and training the Keyblade she could spawn would possibly make her a Magic caster type much like Aqua.

"It's… my magic." Louise began as Vanitas looked.

'So she's already started learning magic though not our style it's a start.' Vanitas thought as this could make his plan of a secret apprentice easier to enact. "Ok go on." Vanitas said as he looked to Louise.

"On my birthday I received my wand and had begun performing magic, but my magic all it results in are explosions. No matter what spell I try to do from the advance ones to the basic of basic they all end up with explosions." Louise said as Vanitas saw this and chuckled to himself.

'It's not that you fail at magic you just don't have the proper foci which means this world still uses the magic wands much like those in Wizarding Britain when I had visited that world one time.' Vanitas thought as he remembered his trip to that world long story short he didn't need to put any Unversed there. "I get the feeling there's more to it than just failing magic." Vanitas said as Louise nodded and looked to Vanitas.

"Yeah there is… my father had engaged me since I am apparently a failure at magic and the only one in my family who still believes in me is my elder Sister Cattleya but she's sick and no one takes her into consideration, I feel that the whole world is crashing down around me and I'm afraid that my future is just to be used as a trophy wife who's only purpose is to please a man and mother heirs for him." Louise said as Vanitas looked at her before chuckling. Vanitas then ended up outright laughing as if what Louise is telling him was just a joke. "What's so funny?!" She demanded to the man she thought was a Dark Knight.

"Nothing much little Louise just that you look ready to give up without trying first." Vanitas aid as Louise looked. "Clearly you have magic is those explosions are anything to go by, maybe you need a more powerful foci then what this world currently offers something surpassing the wands and staffs you all wield." Vanitas said as Louise looked. "Something like this." Vanitas said before summoning Void Gear as it appeared in his hand.

Louise was amazed that Vanitas with his magic summoned a weapon out of nowhere as the keyblade had a gear like design to her. "This is a Keyblade the most powerful weapon in the Worlds but the trick is that the Keyblade chooses its master but if it chooses you it grants you great and incredible power while also being a more powerful Foci for Magic spells." Vanitas said as he was selling it as Louise was wide eyed.

"Um how do I get this Keyblade?" Louise asked as Vanitas smirked under his helmet as he saw this. He got her right where he wants her now to seal the deal.

"Well the Keyblade chooses those with strong hearts, strong souls but that alone doesn't always work unless you know someone who would possibly wield a Keyblade after a ceremony was done and the person proves unworthy for it." Vanitas said as Louise looked to him.

"What is this Ceremony?" Louise asked as Vanitas smirked.

"This ceremony is quiet small but it's like a spell where a Keyblade wielder would pass down his Keyblade to a worthy successor." Vanitas said as he looked to Louise.

"Is there someone you know who is retiring?" Louise asked not wanting to take this noble and funny knights weapon from him.

"Nah but I am looking for a possible apprentice, and I think I might have just found her." Vanitas said as he looked to Louise who was shocked. "Now let's start that ceremony." Vanitas said as Louise quickly prepared. "In this hand you hold this key, so long as you have the making then through this simple act of taking its wielder you shall one day be. Then you will find me, rival." Vanitas aid as he held his key and kneeled before Louise. "No oceans will contain you, no more boundaries above, below, or around so long as you champion your desires and ambitions." Vanitas said as he held his keyblade so the handle was pointing to Louise.

Louise hesitantly reached for the Keyblade's handle before grabbing it as Vanitas saw the weapon glow ever so slightly as he saw the Keyblade accepted her. Once Louise released it Vanitas stood up and looked to Louise. "Now don't tell anyone because not only will the magic wear off but I will be forced to come end you. We clear?" Vanitas said as Louise nodded.

"Crystal clear." Louise said as Vanitas walked away before opening a Corridor of Darkness.

"Then see ya." Vanitas said before leaving. 'If all goes right with this investment and I survive what's to come without the X-Blade then I will have the X-Blade and the old coot will get nothing.' Vanitas thought as his plans were that of betrayal and treason against his master for his own gains.

(End Prologue)

ESKK: Well as you can see this is a fanfic where Vanitas prior to the final battle in the Keyblade Grave Yard in Birth by Sleep passes down his Keyblade to Louise. Yeah if I do this fic Louise will be getting her own Keyblade and a master to teach her how it works. Now then you are free to take this idea if you want as long as it remains Louise X Saito. Anyway see you all soon.