The song is Violet Sparkplug's theme.

Reasons for Violet Sparkplug's color: Blue avatars are typically close combat types, and their color stems from the person's desire to overcome obstacles with their own might. Red Avatars however, desire the Strength to reach faraway places. Mikoto Misaka during the both the fan fictions I've written and the actual Index and Railgun series has shown massive desires to overcome things on her own, yet also reach far for things that were previously thought impossible, such as reach Level 5 all the way from Level 1. The desire that stems from her Red nature became stronger after her continuous playing VRMMOs and she desired to explore every aspect of the Virtual World. Had she not done this, there is a chance she might have just ended up as Blue Sparkplug, but thanks to Sword Art Online, she is Violet Sparkplug.

It is also thanks to Mikoto's strong desire to protect others, a trait common in Green avatars, that almost resulted in her becoming Emerald Sparkplug instead. Kirito and Kuroyukihime later, in the second series Railgun Online: Accelerated World, will both theorize that the odds of Mikoto becoming Green Sparkplug were 43 percent, Blue Sparkplug 7 percent, and Violet Sparkplug a solid 50 percent. And had Mikoto received her Brain Burst Avatar AFTER the events of the upcoming 6th book, there was a solid 100 percent chance of becoming Silver Sparkplug. (Metal colored Avatars result from closing walls around the heart.)

Violet Sparkplug twitched her head to the side as electricity arched out of her forehead and shoulders. "What's the matter Krux? You seem shocked."

"More like amused." said Krux. "I believe this makes it a 3 on 1 duel. To think that one would require three opponents to take me on.."

"M-Misaka-san!?" Silver Crow stammered. "H-how!? N-nobody installed Brain Burst onto your Neuro Linker!! You don't meet any of the criteria to being a Burst Linker!!"

"Guess I got a little help." said Sparkplug with a shrug. "Anyways, Krux, you may be trying to hide it, but I can tell you're totally unsettled."

"Me? Unsettled by a fight against clumsy unskilled humans?" said Krux. "You're joking."

"Yet, against any other kinds of avatars, whether from ALO, GGO, the Underworld, you would have been able to outclass them and defeat them in mere seconds if they weren't veteran Full Divers." said Sparkplug. "Heck, if you're any bit as skilled as Seyat, you should have beaten Arita-san and Kurashima-san by now.. but, I've been watching the fight, and thanks to Nox's ability to see through Data, I've been able to observe a few things.. you got slower the more you fought against Crow and Bell."

"Impossible!!" Krux growled. "I never slow down!!"

"That's true.." said Sparkplug. "Or rather, the more they fought against you, the more they sped up little by little.. and somehow, their bodies were more in tune to fighting you then normal avatars.. that's because these avatars.. aren't just made of ones and zeros comprised within a VRMMO.. they're comprised of Viros DNA.. they're specifically created to give humans the ability to fight Viros.."

"Hahahahaha!!" Krux laughed. "Really!? If that's so, then why did I still thrash them to pieces!!?"

"Oh it's just a matter of finding the right opponent.." said Sparkplug.." For example.."

"FWWIIIIP!!!" Violet Sparkplug disappeared in a burst of speed, leaving a blurred afterimage as she appeared right behing Krux.

She landed a powerful flip kick at Krux, who blocked the blow in a burst of sparks, he slashed his blade at Sparkplug only to hit empty air as Sparkplug reappeared right behind him, landing a punch.

"SLAAAASSSSHHH!!!" The blade hit empty air once more, and Mikoto's blows began to hit at Krux's body, leaving sparks that rippled against his armor, as she began to speed around.

"RRRRAAHHHHHH!!!" Krux's blade became so fast as he repeatidly slashed around and around, that it could barely be seen by the normal human eye.

Violet Sparkplug suddenly flashed around Krux, leaving multiple afterimages around him, like multiple blurred clones all disappearing in and out of view around him.

"What's the matter Krux? Maybe I could go a little faster! Would that be okay?"

"FLASSH FLASSH FLLAAAAASSSHHHH!!!" The blade flashed with several deadly precise blows, and the after images disappeared as Sparkplug fell back, screaming out in pain.

"CRASSHHH!!!" Krux slammed his foot down on Mikoto's chest, pinning her to the ground. "If speed is all you have, then you're finished.

"WHAAAAMMMMM!!!" Silver Crow's vicious kick slammed into Krux's mask, sending him flying, at the same time, Lime Bell grabbed Violet Sparkplug by slinging her arm around her shoulder and leapt out of harm's way.

"You gotta be careful!" Bell exclaimed. "You're only Level 1 right now.. so in terms of the average Brain Burst Avatar, you're actually pretty weak at the moment! And Purple Avatars are weak defensively.. look at yourself.. you've already lost 3 fourths of your health!"

"Owww.. sorry.." Sparkplug mumbled. "Guess Kirito's whole 'overestimating' thing sort of rubbed off on me.. I'm not even entirely sure how to work this avatar's abilities yet.. but I do know how to do this!! SPARK BUBBLE!!"

Right as Krux's sword was about to slash into Silver Crow, a massive spherical electric shield engulfed Crow.. blocking the blade, and sending electricity coursing up Krux's body.

Krux was blasted back by the electricity as Crow landed on the ground, the bubble around him disappearing.

"Had to take a quick look at my ability menu." said Sparkplug. "Hey.. Bell-san! we're both low on health.. but are you ready for a little creative tag teaming?"

"You bet!" said Bell. "Got a plan?"

"Yep!! Charge him head on!!"

"WHAT KIND OF PLAN IS THAT!?"

"SPARK BUBBLE!!" both Sparkplug and and Bell were engulfed in their own electric spheres.

"Oh! That kind of plan!" said Bell. "ALRIGHT!!"

Both Bell and Sparkplug charged at Krux.. their electric shields bashing against his blade as he brought his sword up to block. But as soon as the blade blocked.. the electrical energy surged through the sword and blasted him back once more.

"This is where just skill isn't enough Krux!!" Violet Sparkplug yelled as the shield around both her and Lime Bell disappeared. "SPARK GUN!!!"

A powerful beam of electricity shot out of Violet Sparkplug's forehead, exploding into the ground as Krux leapt out of the way.

BUSHIDO CURRENT!!!" Krux launched himself forward, sending down a flurry of powerful diagonal swipes down at Sparkplug and Bell.

Violet Sparkplug grabbed Lime Bell, and she moved in a flurry of speed, using her incredible speed to keep both her and Limbe Bell out of the way of the powerful attacks.. as they continued to dodge, Silver Crow soared down from above, his arm burning with light.

"LASER SWORD!!!"

Krux whirled around and made to block the blow with his blade, but right before he could.. "SPARK BUBBLE!!"

Silver Crow was surrounded by the electric bubble and Krux was blasted into the ground as the blazing Laser Sword stabbed straight into his chest with a supersonic boom.

And as Silver Crow flew back into the air, Violet Sparkplug dashed forward, and landed a flexible uppercut kick from behind, throwing Krux up into the air.

She then ducked as Lime Bell jumped over her and she kicked Lime Bell's foot, launching her up into the sky.

"THIS'LL MAKE YOUR EARS RING A BIT!!" Lime Bell roared as she slammed the massive bell on her arm right into Krux's face.

A shockwave issued from the sky at the impact, and Krux was thrown down like a meteor before he flipped in mid air and landed skillfully on his feet.

"IMPOSSIBLE!!" Krux roared as he moved his blade in a speedy flash, blocking several punches and kicks from Silver Crow.

"WHAAAMMMMM!!!!" Sparkplug's fist came knocking right into Krux from the left, giving Silver Crow enough of an opening to fire a powerful kick right into Krux's gut.

Krux somersaulted away and thrust out a hand, and several giant tendrils of darkness came tearing out from Krux's armor..

Violet Sparkplug crossed her arms together. "Spark Bubble!!" A bubble appeared around her, tearing apart the tendrils with it's electricity, leaving Silver Crow to jump out of the way as Tendrils tore at him.

"M-Misaka-san!! I could use a shield!!" Crow exclaimed.

"Sorry!! I can only shield my allies 2 times every 2 minutes!" said Sparkplug. "It's a pretty fickle ability!"

"WHICH LEAVES HER WIDE OPEN!!" Krux roared, launching himself at Lime Bell.

"NO!!" Sparkplug launched herself in front of Krux.

"SLAAASSHHH!!!" The sword's point thrust through Violet Sparkplug's shoulder painfully, bringing down her health to a sliver before she could activate a Spark Bubble.

"MISAKA!!" Silver Crow grabbed Violet Sparkplug and soared high into the sky out of the way. "CHIYU!! HURRY!"

"Right!!" Lime Bell said. "CITRON!! CAAAALLLLLL!!!!!"

Immediately, All three Avatars felt their wounds heal, and their health returned to maximum.

"Fools!" Krux growled. "You only delay the inevitable!!"

"SPARK FLOOR!!" Sparkplug thrust her hand out.. and a spark dropped down to the ground and created a massive wave of electric energy that travelled across the ground.

Krux shot into the air, black energy shooting out of his armor like booster rockets once more.

"A-Arita-san!" Sparkplug panted. "Quick.. could you tell me the basics of this world!?"

"Well, so far you've got your regular abilities down!" said Silver Crow. "Each avatar also has a unique ability or enhanced armament.. like me and my wings.. though you'll discover that on your own.. as for the ability gauge, when that fills up, you can activate an ultimate ability."

"So, I take it, Rainbow Stance, the thing I have here on my ability chart is like my ultimate ability or something!" said Sparkplug. "Alright then!! CROW!! FLY ME TO HIM!!"

"WHAT!?" said Silver Crow. "What are you thinking of!?"

"You'll see!!" Violet Sparkplug yelled. "JUST DO IT!!"

Silver Crow did as Mikoto said, shooting at Krux with all his speed.. his wings burning bright with radiant light.

Violet Sparkplug thrust out a fist.. concentrating hard.. remembering everything Yuuki had taught her about the Incarnate System.. the will to bend the system to your own needs.

"DEATH BY PIERCING!!!!"

"Say WHAT!?" Silver Crow stammered.

A massive long electric sword appeared in Violet Sparkplug's hand, and rammed into Krux's blade with a tremendous shockwave.

"WHOOOOO YEAH!!!" Mikoto roared. "HOW DO YOU LIKE ME NOW!!!?"

As the lightning blade disappeared, Violet Sparkplug hurriedly switched to one of her abilities. "SPARK SWORD!!"

A violet sword with a lightning bolt shaped cross guard appeared in Violet Sparkplug's hand and she began to thrust out a furious set of slashes as Silver Crow maneuvered in the air for her, electricity rippling from the blade.

"This blade is nothing compared to mine!!" Krux roared, parrying each blow and hacking the sword apart, shattering the blade.

Violet Sparkplug, noticing now that her ability Gauge was full, yelled out. "ALRIGH!! RAINBOW SPARK STANCE!!!"

Violet Sparkplug glowed with a tremendous light.. and....

Nothing happened...

"Oh... kay.." Violet Sparkplug said nervously. "This might be a prob-

"SLAAAAASHHHHH!!!!" The black blade of Krux ripped across Silver Crow's shoulder and across Violet Sparkplug's chest, sending them hurtling into the ground below.

"GUYS!!" Lime Bell ran over and knelt next to her hurt friends. "Are you okay!?"

"M-maybe.." Silver Crow said, standing up, carrying a weak and shivering Violet Sparkplug in his arms. "Sorry Misaka-san.. being a low endurance type that's only at Level 1.. it's tough.."

"Oww.. y-yeah.." Mikoto muttered. "Don't worry.. I feel peachy.. why didn't it work though?"

"Your ability gauge is empty.." said Lime Bell. "It must have worked.."

"Wait.." Violet Sparkplug muttered. "There's something new appearing on my menu! A new ability? Silver Stance?"

"TIME FOR YOUR END!!" Krux moved in at impossible speeds, his blade a blur.

"I've got this!" Lime Bell yelled running forward.

"No.. wait!! KURASHIMA-SAN!!" Violet Sparkplug screamed running up. She had no choice.

"SILVER STANCE!!!"

Song Starts

A tremendous glow shimmered around Violet Sparkplug's body.. until her violet color had disappeared and had been replaced by..

"SILVER!?" Lime Bell and Silver Crow both exclaimed at once.

The name in Violet Sparkplug's matchup name had switched to Silver Sparkplug as Mikoto looked at her new avatar's color in amazement. "Wait.. WHAT!?"

"RAAHHHH!!!" Silver Sparkplug dodged the roaring Krux's blade quickly, before thrusting out her hand in a powerful melee palm thrust, sending Krux flying.

"Sh-she can change color!!" Silver Crow stammered. "But no avatar in all of Brain Burst can do that!!"

Krux whirled around and attempted to slice Silver Sparkplug's head off.

"BOOMMM!!!" Mikoto shot into the sky unexpectedly, dodging the attack as two massive silver wings burst from her back.

"WHOAH!!" Silver Sparkplug yelled. "Th-this is different from ALfheim!! Wait.. HOW DO YOU CONTROL THIS THING!!!? WHAAAAAAAAAA!!!"

Silver Sparkplug shot around in the sky as Silver Crow activated his own wings and flew on up after her. "I'M COMING MISAKA-SAN!!"

Silver Crow grabbed Mikoto's hand and guided her through the air. "Let your will guide you!! You control the wings!!"

"R-right!!" Silver Sparkplug stammered as she flew together with Haruyuki through the air.

"MIKOTO MISAAAKAAAAA!!!!" Krux screamed shooting off into the air after the two soaring winged avatars.

"My abilities... they've changed Nox..." said Mikoto

"Yes.. I have fully analyzed Violet Sparkplug's attributes." said Nox. "The Rainbow Stance allows you to absorb the abilities and color of whatever Avatar you are touching at the moment.. those abilities then manifest permanently on your ability menu as a Stance.. you can return to your normal color with Violet Stance... The power to change your color, to become anything you need to be to protect your friends.. to become fluid and everchanging!! That is the Rainbow Stance!!"

"ALRIGHT SILVER CROW!!" Silver Sparkplug roared. "Time to take out the trash!!! FOLLOW MY LEAD!!!"

A sonic boom exploded behind Sparkplug as she flew down at Krux. "PEREGRINE FALCON!!!!"

A powerful lightning aura exploded around Silver Sparkplug as the electricity formed into a spear of electricity in front of her.

Krux blocked the blow with his blade.. shockwaves exploding from the blow.

"VELOCITY KICK!!!" Mikoto began soaring around Krux with her new Silver abilities, aiming Silver Crow-like kicks enhanced with electricity at Krux, her feet moving like a gattling gun..

Krux blocked and parried all these blows.. but soon, Silver Crow followed in and began adding quick furious blows of his own, the two silver beings working in unison to pummel Krux with continuous blows.

"DON'T PATRONIZE ME WITH SUCH WEAK ATTACKS!!" Krux screamed out.. and powerful energy comprised of darkness blew his foes away from him...

"We need an edge Misaka-san!" Said Crow. "Or we'll never break him!!"

"An edge huh?" said Silver Sparkplug. "I have just the thing! HOLD ON!!"

Silver Sparkplug shot down from the sky to where Lime Bell was.

"KURASHIMA-SAN!!!!!"

"EH!?" Lime Bell squealed. "Wh-what are you flying at me for-!?"

Silver Sparkplug grabbed Lime Bell's shoulder as she flew by. "RAINBOW STANCE!!!"

As soon as the light finished glowing, Silver Sparkplug redirected herself right back into the sky.. the air whistling past her wings. "LIGHTNING CROW!!!"

Mikoto's wings expanded to twice their diameter as lightning rippled through them.. becoming like a burning angel.. or else much like the other Mikoto Misaka that dwelled in the dimension of Dragon Slayers..

Lightning exploded out of her body as she soared at Krux.. exceeding the sound barrier and then gaining even more speed.

Krux ducked the powerful attack, and Mikoto flew just past him..

However, at that moment.. if Silver Sparkplug had a mouth, she would have smiled..

"LIME STANCE!!!"

Lime Sparkplug's wings disappeared in a shower of sparks as she became green. And a massive bell much like Lime Bell's bell appeared on her left arm.

"GOTCHA!!!" Lime Sparkplug let go of her bell and sent it hurling upside-down like a cup.. trapping the top half of Krux's body inside the bell.

"HEY!! WHAT THE-!? WHY YOU!!!" Krux struggled around in the air, his voice echoing from inside the bell as he couldn't move his arms since they were rammed to his side by the tight bell.

"Th-that's one way to use it... I guess." said Lime Bell, a sweat drop going down her forehead as she looked at her own large bell.

"Whoopsie Daisy!" Lime Sparkplug called out as she sat on top of the bell, knocking on the bell, causing it to ring painfully at the Viros trapped in it. "Looks like the Liberty Bell isn't so liberating after all! Hey Arita-san! Why don't you put this guy out of his misery!?"

"CAN DO!!" Silver Crow flashed down, slamming a giant kick down on the top of the bell as Sparkplug jumped out of the way.

The bell exploded into the ground with a ginormous "GOOOOOONGGGGGG!!!!" and Silver Crow caught Sparkplug and floated down to earth gently.

"That.. was insanely hilarious and awesome at the same time!!" Lime Bell exclaimed.

"Give it up Krux!" Lime Sparkplug pointed at Krux. "You're done!! Your health is almost at zero! And we both know that with your power influencing this world, if we kill you here, you die for real!!"

"I'm.. not.. done.. yet RAILGUN!!" Krux roared.

Something rattled within the giant bell.. and out of it, fell Krux's mask... apparently torn off.

"Oh crap no..." Sparkplug whimpered.

"BOOOOOOOOOOOOMMMMMMMMMMM!!!!!!" A cyclone of darkness shook the entire Accelerated World... creating an earthquake of incredible power.. as a giant beast standing over 200 meters tall appeared.

It was an Oni, a horned black ogre with a main of purple fur around it's fanged and horned head. out of it's back came shadowy tendrils as it let out a terrifying roar that shook the earth.

"HOW DARE YOU!!! TO FORCE ME TO UNLEASH MY BEAST FORM!!" Krux roared, his massive clawed feet shaking the earth as he charged. "IT'S UNFORGIVABLE!!"

"YOU KNOW WHAT ELSE IS UNFORGIVABLE!?" Mikoto roared back. "TRYING TO KILL MY FRIENDS!! THAT TO ME IS THE MOST UNFORGIVABLE ACT IN THE FREAKING WORLD!!!! SILVER STANCE!!!"

Silver Sparkplug shot into the sky, her wings spreading wide with beauty, followed soon by Silver Crow, who held Lime Bell in his arms.

"SPARK GATTLING!!!" Mikoto screamed as she spread out her hands, and a rapid fire of lightning projectiles exploded against Krux's massive form.

Krux powered through the electric attack and made to grab Silver Sparkplug out of the sky. But before he could there was a streak of light. "LASER SWORD!!!" Silver Crow's attack knocked Krux's hand back and Lime Bell jumped off onto Krux's head.

"CITRON CALLLLL!!!!"