Disclaimer: I do not own Kingdom Hearts or FairyTail
As I walked the streets with darkness taking over my heart, I tried to summon the light needed to push the darkness away but couldn't. Instead I fell to the ground unconscious from the pain. I lay there waiting for someone to notice me.
It was getting late and Natsu was making his way back to the guild from Lucy's house. He didn't get far when he spotted a girl lying in the street. He went over to see if she was alright to find that she was unconscious. He decided to take her to Lucy's house, so he picked her up and walked back the way he came from.
Lucy had finished showering when she came into her room and saw Natsu sitting on her bed with a girl lying on it. "What are you doing here again, Natsu?" she asked. Natsu sat up and turned to Lucy. "I found her lying unconscious in the street so I brought her here." he answered. "You could've brought her to the guild!" screamed Lucy. "I had no idea where to put her there." said Natsu.
I opened my eyes to stare at the ceiling. Darkness formed itself in my vision. It smiled viciously at me. "Soon, your heart will belong to me." It said darkly.
Natsu and Lucy stopped talking and turned to me as I sat up. Holding my hands in front of me, I summoned light. Whispering to myself that my heart belongs to me, I turned the power towards me and attacked my heart.
It had just made it worse. I cringed on the bed as darkness corrupted my heart some more. Natsu came over, hoping he could help. My hands clutched at my chest, wanting the pain to go away. I fell unconscious again.
Natsu stared at me with worry, wondering what could be doing this to me. He had noticed me clutching my chest, and wondered what was happening under my shirt. As he began to lift the shirt, Lucy smacked his hand.
"Ow, what was that for?" he cried.
"Whatever you were gonna do, don't do it." she said. Natsu frowned at her. "I was gonna check if she was wounded, for your information." he said.
"Oh. Then let me so it doesn't look weird." she said.
"Wouldn't it look weird if either of us did it." said Natsu.
"Oh. Then you do it." said Lucy.
He lifts the shirt and stares wide-eyed at a large dark spot on the girl's chest. Lucy gasps. "What kind of wound is that?" she asked.
"Maybe it's some kind of disease." suggested Natsu.
"Maybe Master Makarov knows what it is." said Lucy. Natsu pulls the shirt down and stands up. "Yeah. We'll take her to him tomorrow. Meanwhile, she can rest here in your room." said Natsu, already heading out the door. "What!? Natsu! Get back here right now!" screamed Lucy.
"See you tomorrow, Luwinda." said Natsu before heading outside. "It's Lucy!" yelled Lucy, frustratingly getting dressed for bed.
The next morning Lucy wakes up to Natsu standing in her living room. "Can't you knock?" she said grumpily. She goes back to sleep, which is on the couch because I was lying on her bed. Natsu goes over to her and shakes her awake. "Come on! We gotta take her to the Master." he said. Lucy sits up and rubs her eyes. "Then go get her. I'll be with you in five minutes." she said. Natsu heads into the room that I'm resting in and finds me still out cold. He feels my forehead and finds it freezing cold. He wraps me in Lucy's blankets and picks me up, then leaves.
Walking into the guild, Natsu runs into Gray. "Not right now, Gray. Can't you see I'm busy." said Natsu, walking past him. Gray walks with him to the bar where Makarov is. "What's with the girl?" asked Gray.
"I don't know. You tell me." said Natsu, lifting my shirt up. Gray winced at what he saw. "Looks like you burned her pretty badly." said Gray. Natsu turned on Gray angrily. "I didn't burn her! I found her like this!" said Natsu angrily.
"Calm down, Natsu." said Makarov, stopping a fight from happening. Natsu looked calmly at the Master. "Yes Master." he said.
Makarov examines me for a while, then looks at Natsu, surprised. "This girl is not from this world!" he said.
"Then she's an alien?" said Natsu, surprised by the Master's look of surprise.
The doors to the guild burst open and a boy with spiky brown hair, a duck, and a dog walked in. The boy scans the room until his eyes settle on the girl lying on the counter. He runs over to her, screaming her name in excitement. "Sarah!" he yelled. He looks at me and sees the dark spot spreading across my body. "Oh no. The darkness is taking over her heart. The only thing to do now is go in and stop it myself." he said. The duck and the dog protest but the boy holds out his keyblade and points it at me. My body glows along with Sora and his keyblade. Everyone in the guild just watches in amazement. The glow stops and Sora disappears. Donald and Goofy run up to me. "Now what are we going to do? We can't carry her to the ship by ourselves." said Donald, oblivious to the people around them.
"Maybe they can help." said Goofy, noticing the others.
"Relax, Goofy. We'll just wake her up. Thunder!" said Donald, casting magic. A shock of lightning strikes my heart, making the darkness spread to my arms and legs. I wake up, cursing Donald.
"You idiot! Didn't you think to remember that Sora's in my heart!" I screamed at Donald.
Donald looked shocked and embarrassed when he remembers. "Oh, sorry." he apologized. My head feels dizzy and I almost fall off of the counter but Natsu manages to hold me up. Darkness formed in my vision again. It looked at me with a devilish grin on its face. "Your heart's submitting itself to me as fast as I thought." It said. I cast a shield spell over my heart and in my vision I see a barrier come between me and the darkness. "Your shield won't protect you forever." It said.
The darkness clears and I get up off the counter. "I…I have to go." I said weakly. Natsu grabs my arm to stop me but I pull it away.
Walking out the doors of the guild with Donald and Goofy right behind me, something hits me, but before I fall someone catches me. Natsu runs out to find an enemy. "Gajeel!" yelled Natsu.
"Well, well, well. If it isn't the fire breather." said Gajeel. He places me on his shoulder.
"What are you planning to do with her?" said Natsu, so angry that flames appeared in both his fists. Gajeel doesn't say a thing and flies off.
At the Phantom Lord guild hall, Gajeel throws me on the ground as the guild's Master for Phantom Lord walks in. "That power that comes from her. It reeks but it seems strong." said Jose. I scream in pain as the darkness spreads some more, growing darker at the start. "Even she can't handle its power." said Jose. As he leaves the room, Natsu bursts through the ceiling all fired up. Gajeel turns to face him. "Fool. There's no way you can save her." he said.
"Then at least I can try." said Natsu coming at Gajeel with a flaming fist. Gajeel hits him midair with an iron fist.
As they fight, Sora figures it is pointless fighting from inside Sarah's heart. He goes to leave but is caught in a cage. The dark figure of a man appears outside the cage. "Fool. You've been helping me the entire time." It said. Sora looks at it angrily. "Well, you've just lost your help." he said breaking the cage with one blast from his keyblade.
Sora appears outside of Sarah's heart. He sees her lying there with eyes closed. He calls forth his keyblade and stands over her with the blade raised over her heart. As the darkness completes its control over me, Sora plunges the keyblade into my heart and the darkness clears in a flash of light. I open my eyes and stand up to see Gajeel and Natsu still fighting each other.
Gajeel stops for a moment and looks at me. He sends a fist of iron towards me. Before it reaches me, I summon my energy, then holding out my hand toward the metal, I shout my command, "Iron, bend!"
As the iron obeys, Gajeel yells out in pain, for the metal is his arm. He brings his arm in and nurses it. Natsu stares, mouth open in amazement.
Sora turns to me. "Time to go now." he said. I turn toward the wall and break away a huge gap with a burst of magic. "I'm not finished yet." I said pointing to the strands of darkness heading off to the mountains. I prepare to head off in the direction the darkness went but Sora stops me. "Careful. You could fall." he said indicating that we were on a high floor. I looked at him and winked. "Who said I was walking there." I said before flying off. Natsu tags along, then Sora comes using glide.
On the mountain…
Darkness forms the castle that is known to Sora as,
End of Part 1