Sort of a more cannon version of the Vanitas Remnant. Whenever "He" is with a capital H in the middle of a sentence, it's the Lingering Will. Definitely longer than the other chapters. Enjoy, Read, and Review.
Remnant
It was the day that he appeared. He too was just an empty soul, but more powerful than before. Vanitas, the embodiment of dark emotions, had returned. He looked the same as ever, but monochrome, a lifeless shell. The insignia of the unversed emblazoned his mask. Even his own keyblade, Void Gear, had become drained of color.
"Ah, Terra. I looks like both of us are now one and the same. Empty, with no purpose to live." He surprisingly spoke, even though his voice did carry a light echo.
Shut up! I'm nothing like you! He said, even though it came out like a metallic wind. But The Remnant seemed to have understood.
"Oh, but you are. Xehanort won, I guess? But the old man left me behind, even though it was only because that little bastard Ventus got the slip-up on me."
Guess again. I know that Ventus defeated you, I saw the explosion. Xehanort might've taken my body, but he's been defeated.
"Hm. He might've failed destroying your mind, but I'll just have to take care of you myself!" The Remnant got into his fighting stance, a dark aura surrounding him.
Bring it. He stood up from his kneel. He pulled Ends of the Earth from the dirt, and also got into his stance. The two broken spirits stood still, waiting for the other to make a move. Vanitas suddenly sent out dark trails of shadows. Out of these shadows grew clones, who lunged forward for an attack. He blocked their swings, and counterattacked with a shockwave that obliterated the clones. Vanitas ran forward with a mighty swing. He did the same, and the two warriors were locked in a struggle. Sparks flew off the colliding blades, neither man giving an inch. Just then Vanitas' guard slipped, and He went for the kill. But his keyblade went through the Remnant, who seemed to be frozen.
"There's no escape!" He spun around to see Vanitas come out of a dark portal above him he was too late to counterattack, and was knocked away. Vanitas then teleported in front of Him, and attacked with a furious combo.
He took the damage of it, then dashed out of the way as a dark fireball exploded where He would've been. He then slid back around Vanitas to deliver a quick combo before strafing away.
Vanitas then started to dash quickly around Him, the many afterimages surrounding Him. At the last second he blocked the sudden attack by The Remnant, and used the opportunity to summon Demolition. The meteors came crashing down, causing the ground to rumble from the immense impact. Vanitas was caught in the blasts, knocked around by the shockwaves. He went for a combo, but Vanitas slipped behind his attack and delivered a flurry of thunder attacks. He rolled out of the attack back onto His feet just as Vanitas spun his keyblade at Him. He guarded against the attack as the two weapons grinded against each other. Their keyblades immediately deflected each other, knocking away both fighters. Vanitas was the first to recover, and burst forward to attack. He also regained his senses, and saw Vanitas advancing quickly. In a brilliant display of speed and strength, He thrust His keyblade forward and warped. Vanitas chuckled, and turned about-face.
"Tch. Nice try, but you'll want to do better than that-" Vanitas was cut off as he felt an excruciating pain go through him. He noticed a rocky protrusion in front of him showed a diagonal cut through it. His vision became slanted, and saw bits and pieces of himself floating away and then disappearing.
"Hm. You lucky bastard. You've cut right through me." Vanitas said. He remained quiet.
"But remember this, Terra. You and I, we're one and the same. Empty shells of our real selves. Lingering Wills with no purpose for existence. What's mine is yours, and what's yours is mine. Like me, you'll eventually fade away, and the memory of you that your friends keep will too." Vanitas said, and with the last of him disappearing , his laugh echoed in the gray nothingness of the world.