I was impressed, though there were no ways I could say so using my list of words Loaders can say. So, I elected for the nearest one.
"Nice one, boss." I said, looking at the pink alicorn. She looked confused, before grinning. Next, I turned my attention to the troopers. "Prepare for hostile engagement. Air based, attack in swarms. RPG Loaders: wait out here and fire your missile batteries at anything that is NOT a pony. Orders end. Move."
"Acknowledged." replied both RPG Loaders simultaneously, before they used their jump jets to fling themselves onto some nearby roofs, much to the horror of the ponies who owned them. Cadence, Twilight, the troopers, and I quickly ran to the church doors. We needed to be fast, before Celestia finished her sentence.
"...I now pronounce you, husband an-"
"WAAAAAAIT!" Twilight yelled, busting the doors open as everypony groaned at her intrusion. I decided to make my appearance known. Firmly, I ordered the troopers to get into firing positions as I stomped out into the chapel aisle. Ponies from both sides gasped in horror. Celestia, meanwhile, was stepping forward to confront me.
"Are you really this heartless, machine?" she growled. "You interupt a wedding just so you can invade?"
"Negative." I replied angrily. "As it turns out, I'm saving this wedding. For start, that princess is a fake." The gathered guests once more gasped loudly at:
A) Me
B) My accusation, and
C) The real Princess Cadence charging forward into the aisle to tackle the imposter.
"Who's the real Cadence?" Celestia gasped, looking between the two mares writhing and bucking and grappling on the floor.
"The real Cadence is not wearing the wedding dress. I found her and Twilight Sparkle underneath Canterlot. They had been banished there by the imposter so that she might assume control of the kingdom and feed off of your love. Unfortunately she has almost broken Shining Armor's protection spell. Her army will burst through soon. I am here with these soldiers to eliminate that threat." The fake Cadence kicked the real one off, growled with eyes aglow, and began to reveal her true form. Once she did, though, she laughed wickedly.
"Well, it seems I have been figured out by a foolish machine." she cackled. "No matter: soon, my army will break through the shield, and we shall feed on all of your love! Isn't that right, dear?" Shining Armor weakly nodded. By this point, I had had about enough crap.
"FIRST LAW DISABLED." I boomed, spinning my rotors up to full pelt and beginning to advance on the Changeling Queen. Quickly, she began to fire magic blasts, each one ricocheting off my blades and back to her. By this point, the gathered audience had fled the hall from our battle, leaving more than enough clear space. "Troopers, open fire." I ordered. More blasts filled the air; red of incindiary, green of caustic, purple of slag, yellow of TORGUE, and blue of electricity. Each round that impacted the Queen caused her to yelp in pain, slightly slowing down her volleys. Just before we could score that QTE-triggering hit, a loud boom followed the shattering of glass as the shield broke. Air that had remained pressurized immediately rushed out to equalize pressure in the city. However, this also meant that Changelings could get in.
"Shit." I muttered in a monotone voice. "Everybody outside. Prepare to engage."
"I'm not through with you yet!" Chrysalis yelled, blood drooling slowly out of her mouth. Promptly, I decided to break the Geneva Convention. Stomping up to her weakened form, I gazed into her eyes.
"Neither am I." I growled, before stomping swiftly on her head. Green blood, chitin, brains, and other internal organs spattered my foot as the Queen was brutally crushed like the bug she was. I heard something crumple behind me; I knew somepony had fainted. Ignoring this, I stomped again, because you can never be too sure, and followed my squad out of the door.
Meanwhile, Celestia vomited into a nearby plant pot, the strained heaving of her stomach clearly betraying her image of a powerful leader who'd seen it all. Clearly she had never seen a bug getting squashed.
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Changelings exploded in bloody showers of limbs as the RPG Loaders stationed on the roofs nearby mercilessly pounded them with rockets. Meanwhile below, Royal Guards were being overwhelmed with Changeling squads; 12 to the Royal 1.
"Troopers. Engage." I ordered. The soldiers, being the brave souls they were, charged down the stairs, putting down Changelings in a few well placed shots. Following suit, I was stopped by a sudden force. I couldn't move, and, looking down, I was covered in some deep blue aura.
Damn.
"You have a lot of nerve to show up here." Luna growled, rotating me to face her.
"Acknowledged. Release me so I can kill Changelings." I replied.
"After what your boss plans for Equestria? I don't think so. After this is all over, we will be publicly destroying you."
"Negative. I returned to destroy this infestation. That is why the other Hyperion forces are here. RPG Loaders are preventing them from landing, and the troopers kill the rest. I had plans to kill as well, but you are preventing me. Please stop."
"No."
"What id I were to explain to you the fact I was originally human?"
"...human."
Suddenly, Luna released her grip, dropping me to the floor and cracking the pavement.
"Continue."
"A.I cores for Loaders are based from real people. However, as the saying goes, quote, you cannot make an omelette without breaking eggs, end quote. I was killed in order for Hyperion to use my brain as a template for this A.I core. My family was also killed, most likely to be used for this same purpose. However, now I am a Loader, I may take on several different battlefield roles: suicide bomber, Anti-Aircraft, trooper, commanding officer, pyro, sniper, air support, heavy firepower, etcetera."
"That sounds horrible!"
"Not as horrible as the fate of your country if we do not repel this invasion."
"Very well." Luna sighed, conjuring a sword from thin air. "Let us battle side by side. Then, we may discuss this."
"Acknowledged, Luna."