A/N: Welcome to Chapter 7 of Kuroi Kokoro!

Please leave reviews! They help me become a better writer, so you get better content!

NoodlesT: Thank you! You will see much more of it in this chapter!

SilentTheOne: Haha, I love cliffhangers! Thank you for the nice review!

And now, onto the battle of Nina and Natsu!

Chapter 7 - Nina versus Natsu

Silence held in the air as shock surged throughout the guild hall. Natsu's eyes were pasted wide opened, his pupils shaking frantically. She's the girl from before. Natsu thought back to their crossing paths on the way to Phantom Lord. Natsu shook his head, noticing the Phantom Lord guild mark that was displayed on her shoulder. She's with them?! Natsu's shock soon turned to anger, clenching his fist. This allowed fire to spawn around his fist.

"She was your comrade." Natsu muttered, his bangs covering his eyes. Gajeel's right arm was still extended as the sword, in front of Nina's unconscious body. Gajeel's head was tilted down, as if he were looking to the ground, "Wasn't she?!" Natsu outraged, his fire-engulfed fist launching at Gajeel's depressive form. Gajeel still hadn't moved an inch from Natsu's harsh tone, "Answer me!" Natsu demanded, his fist connecting with Gajeel. Or so Natsu thought. Natsu's flaming fist was stopped by Gajeel's free hand. Gajeel dissipated the sword that restricted his other arm. He prepared to punch Natsu in the stomach, but stopped when he realized his hand was covered in Nina's blood.

"This was all your fault!" An enraged Gajeel pulled his arm back to punch Natsu. Natsu had time to catch a glimpse of Gajeel's face. Anger-filled tears ran down his cheeks. Finally, it clicked in Natsu's head, why Gajeel did what he did. Natsu grabbed Gajeel's fist forcefully before Gajeel was able to punch Natsu. Anger was written all over Natsu's face.

"You idiot!" Natsu punched Gajeel in the chest, sending him flying into the guild's wall, "are you mad at her because Lucy didn't let her die?!" Natsu punched Gajeel again, this time in the stomach, pushing him further into the wall. Gajeel didn't fight back, knowing he deserved it, "You want her to be left for dead?!" Natsu punched again aiming for Gajeel's face. But, this time, Gajeel grabbed Natsu's fist in his hand.

"She's weak because she lost," Gajeel started, Natsu trying to jump in with his words. But Gajeel didn't let him, "She came home on the shoulder of her enemy!" Gajeel punched Natsu, throwing him back onto the ground. Gajeel winced his way out of the hole Natsu had punched him into.

"I'll ask you again," Natsu muttered, "you want her to be left for dead?!" Natsu lunged at Gajeel, his fist enraged with flames. Gajeel returned the favor, lunging at Natsu.

"Winter Soldier's Battle Ground!" Suddenly, the entire floor was turned to ice, along with the walls. Natsu slipped and fell, allowing Gajeel to punch Natsu into the guild wall. Everyone stood in shock, wondering who conjured the spell. Lucy then realized. A person was standing next to her, battle ready.

"Nina?!" Lucy cried, Nina was standing, barely, her hands in front of her, palms facing the ground. Lucy walked over to Nina, a hand in front her, bracing for the worst. However, it wasn't good enough. Nina's head turned to the direction of Lucy. Her wounds are iced over?! Lucy thought as she observed the red ice that covered where her wounds used to be. Nina's face was angry, extremely angry. Nina;s body turned towards Lucy quickly, almost too quick. Nina held her hand out in front of Lucy's face.

"Winter's Frozen Lock." Nina whispered. Lucy was then encased in a small, hollow box of ice. It was barely taller than she was. Lucy banged her fist on the ice, annoying Nina. Lucy's words were lost to the ice. No one could hear her cries for help. Except for Natsu and Gajeel. Nina's attention returned to Natsu, who was getting up from the wall he was embedded in. Nina could feel Gajeel's stare, but refused to return the favor.

"Why?" Natsu muttered, "they wanted you left for dead." He struggled to keep his balance on the ice floor, while Gajeel had created ice skates on the bottom of his feet with iron. Natsu charged Nina, which surprised Gajeel. Nina held out her hand, stopping Natsu's fist by freezing it. Natsu' fire faded away. That's how she stopped Taurus's axe! Lucy thought as she remained in her ice box. The box was too tight for her to be able to reach her keys, or even look down to see them even. Natsu then tried to kick Nina in the stomach. That's her weak spot! Lucy exclaimed in her head, awarding Natsu for his quick thinking. However, Nina was faster. An ice wall blocked Natsu's leg mid-swing. Natsu was stuck, the ice was enveloping his leg and arm. Nina then released him. Natsu stood there in pure awe. Since when was she this strong?! Was she holding back against Taurus? Lucy thought. Her face was also showing pure amazement, as well as fear for Natsu, "What do you want with Lucy?!" Natsu finally cried, stopping the silence. Nina, however, didn't respond. Nina raised her arm out to her side, opening her hand. Requip?! Natsu thought as the pose Nina struck was similar to that of Erza's when she changed weapons.

"Winter Soldier's Rapier." Nina muttered. A small and this sword then appeared in front of Nina's hand. However, it was made of ice. Nina's hand then closed around it, bringing the rapier to life. The blade shined silver, the guard was a snow white with brilliant sky blue snowflakes decorating the sides. The hilt was white with the same blue as the snowflakes woven around it. Natsu looked at in in awe, it was beautiful. And then he caught a glimpse of Nina's face. It was dull, focused, serious. Gajeel glanced over to Nina once again as he fought a muscular man with white hair. She has the same look as that rain woman. Gajeel thought. His attention was then recaptured by the muscular man. In a blink of an eye, blood covered the floor once again. But this time it wasn't Nina's.

"Natsu!" The red haired woman cried as her comrade was impaled be Nina's rapier. The beauty from the blade had faded away, replaced with blood. Nina then pulled her sword out of Natsu's stomach slowly, causing Natsu to wince from the pain. Blood dripped from the corner of his mouth. Once the sword had exited Natsu's stomach, he fell to the ground, "Natsu!" The same red haired woman called, "Don't give up so easily!" She demanded with hope laced through her tone, "It's just a stab wound!" Nina smirked at what the woman had said.

"And cut or stab from Winter Soldier's Rapier isn't just a stab wound." Nina slashed her sword behind her, throwing Natsu's blood from her sword, "It freezes the victim from the inside out." The red haired woman then noticed the ice growing from the stab wound. Nina then allowed her rapier to disappear from her hand, shattering into ice shards that dissipated before they hit the frozen ground. Natsu clenched his fist.

"I'll just melt this ice!" Natsu cried in hope. He focused inside of him, trying to erupt into flames to melt the ice that was killing him.

"I believe you asked my why," Nina started, grabbing Natsu's attention. Natsu waited for her to continue. Nina let out a sigh, "I wanted to be left back there when I failed my mission. I was prepared to die." Nina crossed her arms, "Your friend refused to leave me." Nina rubbed her forehead with her hand to show great distress, "And for that," Nina started. The ice in Natsu's stomach shattered. Nina remained turned away from Natsu. Natsu placed his hand on his stomach. My wound is gone! Natsu thought in shock, "I won't kill you." Nina finished. She started to head over to Lucy to take her to Master Porla. However, she was stopped by a loud thud behind her.

"Master!" multiple people cried. Nina checked behind her to see if it was Master Porla, and luckily, it wasn't. Must be the Fairy Tail master. Nina thought. She then froze Lucy's hands and legs together. Following with her dissipating the ice box. Nina caught a glimpse of Gajeel, who was no longer battling because of the distraction. She then proceeded to throw the captured girl to Gajeel, who nodded to Nina when he had a grip of her. Gajeel fled through the back of the guild, Lucy in toe. Nina's attention was the returned to the crowd of Fairy Tail members herding over their, now green, master.

"What did you do to him?!" Natsu asked in rage, getting in Nina's face. Nina rolled her eyes, shrugging her shoulders, "Tell me now!" Natsu demanded, idiotically. Nina punched him in the face, throwing him back into the crowd of the Fairy Tail guild.

"Don't waste the life that I have given you." Nina warned. Out of the corner of Nina's eye, she saw Juvia walking in her direction. All of Fairy Tail had their attention on Nina and Juvia. Anger floated through the air, but fear was hidden beneath it.

"Juvia will allow you all to retreat, Phantom Lord has what they needed." Juvia said, her face bland and dull as always. This caused Natsu to become enraged, going to attack Nina with his flaming fist. But he stopped, a hand was holding his wrist sternly.

"Erza?" Natsu asked, confused but still angry, "We have to get Lucy back!" Natsu demanded. The rest of the guild was in shock, They have Lucy?! They all thought.

"We have to retreat." Erza muttered, her bangs covering her eyes. Her hand was shaking as she held Natsu's wrist.

"Are you kidding me?!" Natsu outraged, "I'll bea-"

"NATSU!" Erza snapped. Her cheeks flooded with tears. Natsu's world had seemed to be shaken, but he begrudgingly agreed with Erza. He stood back up straight, sending Nina a deadly look, "Retreat!" Erza ordered. The guild members began running past Nina and Juvia, except for one. A man with shaggy black hair. He wasn't wearing a shirt, he was showing off his blue Fairy Tail insignia that was brandished on his right chest. He wore baggy jeans, and a silver cross necklace dangled from his chest. He glared at Nina with an evil stare. It was as if he was stabbing her through with his eyes. He began to stomp up to Nina, grabbing her shirt by the collar.

"Ice is my element."

A/N: Thank you all so much for reading Chapter 7 of Kuroi Kokoro! I just wanted to add in at the end of this chapter, that if you like Sword Art Online, I just published the first chapter of my new crossover between Fairy Tail and Sword Art Online! I think it's a wonderful story and I think you'll enjoy it!