Jadeite was working on something, when Kunzite walked in unannounced.
"What do you want?", the blonde-haired man asked with more than a little visible irritation.
"Queen Beryl has a mission for you.", the white haired man answered. "She wants you to go and aid Mercury at the battle tonight."
Jadeite was taken aback. "Why me? Surely you should go and help her. She was, after all, your idea."
"But the Youma aiding her work for you.", Kunzite responded. "And besides, if you don't, then I'll reveal your little secret to everyone in this kingdom."
To illustrate his point, he pulled out a recording device from his cloak. When it played, the voice was a metallic like pitch that Jadeite recognised as his former ally Motro. "Zoisite was becoming an annoyance to everyone in the Dark Kingdom, so myself and General Jadeite arranged to have him taken out and blame it on the Sailor Senshi."
Jadeite was shocked. "How did you get this?", he demanded to know.
"I had a recording device installed in Mercury's staff for use in the field. She found Motro discussing important information with Sailor Venus. This was part of their conversation."
With that, Jadeite gave in. "Alright, I'll go. But if I succeed, you must destroy that recording."
As his ally teleported away, Kunzite smiled "We shall see, my friend."
At the train yard, Mercury and her soldiers were finishing their preparations. The entire area had been modified to give them the advantage in the fight. Venus' mother was bound to a wall, as the 9 warriors were cantered around that wall to prevent their enemies from reaching it.
As if on cue, 5 figures jumped in from seemingly nowhere. Mercury knew instantly that these were were the Sailor Scouts that were presently awakened. "So I see that Venus got you losers to come here after all.", she said with a mocking tone of voice.
"We came because some of us know what it's like to lose a parent.", Jupiter declared.
"We're not going to let another child lose their mother because of a selfish feud.", cried Mars.
"Especially not a little punk like you.", added Neptune.
Daburu Pisces was simultaneously worried and overconfident. "Oh god, they sound serious. We might lose this fight." "Please, its 9 of us against 5 of them. They don't stand a chance."
"There may only be 5 of us, but we can still take down you creeps.", declared Uranus.
"How about 8 of us?", another voice rang out. Everyone turned to the source. It was the mysterious Tuxedo Mask, accompanied by Artemis and another Senshi with muted green hair.
"8 of you? The more the bloodier.", said the man made of soil, now dubbed the Dirt Monger.
"Who're you?", Venus and Mars both asked the green-haired newcomer.
"All you need to know is that I'm here to help when I'm needed.", she said before charging towards the red-skinned Youma to engage it in battle.
Artemis leaped forward to engage Daburu Pisces. "You silly creature, do you really think a cat can beat a full sized monster like me?", the creature sneered.
"Maybe not like this," Artemis said "but I can take you down." Then, his tattoo began glowing, he span around 9 times and turned into a humanoid male, dressed in white with long hair. "Now I can take you on.", he said.
"Oh crud.", the fish managed to splurge before Artemis gave him a very brutal beat down. Elsewhere, Venus came face to face with Mercury.
"I have to admit, when I was sent to spy on the Scouts, I didn't expect you to come along and ruin it.", Mercury admitted. "But now I'm going to remove your interference. Permanently."
With that, she pointed her staff at her opponent, firing blasts of energy. Venus dodged with incredible agility, before aiming her hand at the weapon, crying "Venus Crescent Beam, Smash!" The staff was knocked out of Mercury's hands, causing her to be pushed back onto the floor. "Mars, destroy that staff, now!", Venus shouted.
"Can do.", Mars replied. She turned away from her opponent - the one with the yellow skin - and launched a fireball at the staff, burning it to ash.
Elsewhere, Daburu Pisces and the three Youma that had been created for the fight reverted to their original forms. The homeless man quickly fled, scared for his life.
With the destruction of the staff, things began to turn around for the Senshi, Venus destroyed Balm, Jupiter took out Iguara and Mars incinerated Kigaan. That just left Garoben, the Youma that had attacked the cram school. Before any of them could make a move towards her, Ami got herself up and held up her transformation pen.
"You turned me into a puppet.", the girl said angrily. "You forced me to betray my duties as one of the, for your own selfish ends." A blue aura began to surround her. "Worst of all, you forced me to be an accessory to the potential death of innocent people. I won't allow you to walk away this time." As she said this, her pen transformed into a more elaborate version, with a star shape surrounding the Orb on top.
Everyone watching was shocked, especially Artemis. "Could it be? Star Power?"
The energy caused Ami to turn onto Sailor Mercury, the real one this time. "Shine Aqua Illusion!", she cried. The blast caused the Youma to turn to ice and shatter. "This time, you're gone for good.", the bluenette said definitively.
A few minutes later, things had quieted down, Tuxedo Mask and the majority of the Senshi had vanished and Artemis had turned back into his cat form. Now he was explaining some things to those that remained, Namely Venus and Mars. Jupiter had taken Mercury home.
"So you're saying that your species can turn into a human appearance if you choose to do so?", Mars said, having trouble just comprehending that there was another cat like Luna, who had been disappearing for days at a time to "take care of business".
"Yes, but it needs a constant concentration to maintain, otherwise it can be very exhausting.", the white cat replied.
"And this Star Power. How can we unlock this?", asked Sailor Venus.
"You need to have a total concentration on doing something pure, like how Mercury's purity came from her desire to see justice done to that Youma for what it did to her classmates at the cram school."
But before he could elaborate, a slew of icicles flew down, followed soon after by the one that threw them. Jadeite.
"Ah if it isn't the lovely Sailor Mars and the elusive Sailor Venus.", he said with a faux happiness. "You may have destroyed my servants, but I shall take you both down."
But both Mars and Venus were getting tired at this point, so they simply launched their attacks at him, severing his left arm and knocking him into the sea. After remaining a few minutes to make sure he was deceased, the two girls went their separate ways.
I know I don't normally do this, but here are some notes for this chapter.
I've been planning for this chapter ever since I had Mercury outed as a double agent. I intended to have the brainwashing be broken around halfway through the story.
I moved the site of Jadeite's final stand to a train yard both to remove connotations of terrorism and to make it seem like it could be staged in real life. I also apologise for his abrupt death, since I couldn't figure out how to incorporate him into the fight.
And on a final note, the little girl from the previous chapter. I may not have referred to her by name, but you can probably guess who it is based on the description.
Next time, the character who you've probably been waiting for since the start of the overall story shows up.