The Story!

Going with 3 for main choice. 2 for additional, better to be honest tbh. Do not wanna risk too much.

I will killl your children.  Every single one of them.  And the children of everyone you love and everyone they love.

Ah, I see. Haven't been keeping up with much.

Maybe I'll host the next round of that...

1, but tell them (Garnet and Steven) politely beforehand.

Either sealed in there by someone who couldn't kill it or using the mirror to watch on from another dimension while it learns about us? The latter would certainly explain why the only way it can talk is through mimicry.
Anyways, I agree with Loop here. We've got places to be and information to tell people who probably shouldn't know but who we're going to tell anyways because "they'll find out eventually" is now a valid reason for not even trying to keep a secret (yes, I'm still salty about that vote).

The first one. Again, I don't watch the show and also it's SRW so who knows what's really in there, but I think she's messed up because she was damaged before being sealed or something? Yes. Yes, it is. Better to get on trouble for what you did than what you did and lying about it.

Steven's Home

It was time to make a move out of the adorable beach house – he'd spent too long, and the truth was that he could probably spend a lifetime getting involved with the Crystal Gems and their magical action. The line had to be drawn there. “Steven, I'm gonna head out. Take care of everyone.”

“See you soon, Logan. Next time we'll speak a bit more in-depth about fusion,” said Garnet who seemed relieved to not have him there for the scene that was playing out.

“Uh, really? I-” Steven started speaking, but was cut off by the mirror on full blast.

“No! Ambassador help! Help help help help take care of everyone Logan-” was as far as the UA pilot heard before the door shut and it became unintelligible.

“Whatever's going on in there can't be my problem.” He said this out loud as he walked back towards the town proper to make sure he agreed with the sentiment.

Running to U-Stor-It

“Shitshitshitshitshit!” Out of air from having sprinted the moment he saw 'it', Logan dashed as far as his naturally-thick calves could carry him. The thought that Herkimer Diamond could have covered the distance in mere moments was just one of the negative thought trees that had taken hold on him. The others were along the lines of 'why are they here' and 'have I fucked up by taking too long?'. After all, there was an Action Frame Carrier flying above Beach City. Gunmetal gray and full of tanky muscle, it have been a welcome sight any day but one on which Logan had gone against protocol, and the shadow it cast was, to him, foreboding.

As he finally reached his robot and its platform, he was greeted by Sonya. For the first time ever, she was actually wearing the standard-issue white jumpsuit that had been sent for her, and she was staring up at the floating behemoth. Considering that she was looking more professional than he had ever seen her before, Logan thought it was quite a nice look. “That thing is here for us, right? This is your guys, right?”

“It's... It's my guys, yeah!” Thinking of this fact reassured Logan a little, and he embraced Sonya briefly face-to-face. “I know I took too long. If there's any trouble, the heat's all mine.” The two leaned in for a brief but tasty kiss, and she nodded solemnly.

“Do I get to ask where you were?” asked the engineer as she stepped onto the small elevator with her friend.

“Yes. I fused with Steven and went to Japan to save Shinji.”

“Instead of going to Newark and saving a city under attack by a small army of mecha?”

“Yes.”

“...Even after Shinji left?”

“Yes.”

“Okay. I will say though, that thing has been flying there since I arrived here when you told me to get the W-E ready.”

Logan opened the hatch as quickly as possible, and the two humans entered the all-white cockpit.

“Welcome, sir.” Adam was the same as ever.

“Hi Adam, let's get on our way to Newark then, shall we?” Logan smiled widely as he strapped himself into his seat.

“Yes, sir. Prepare to be pulled aboard.”

“Oh god, does this thing have a tractor beam?” Sonya sounded like she might pee her pants if he said yes.

A rough clunking sound on the exterior of the machine suggested that no, they did not. Confirmation of this fact was provided by the Wonderchild's many cameras, which indicated that they had been grappled by a claw machine-like device. From there, the eighteen meter tall mecha began ascending to the sky above Beach City, towards the carrier of weapons. For the AFC was far grander than the Wonderchild, being made to carry multiple units of similar scale to what the Ambassador was packing.

“I kind of like the pull cables. Must be like when Steven gets picked up by Garnet. Just hanging in the wind, like laundry.” Logan had done this procedure before, but it had been quite some time since he had even been near this carrier. “It's weird, though – I've gotten used to having full control over this boy.”

“The Wonderchild's a boy? So you go in him?” Sonya winked coquettishly as she held onto Logan's seat for stability.

“All the time, yep. Feels good.”

As they were about midway to the Action Frame Carrier, a face came on the screen in front of him. Twas the very last person he'd expected to see when he woke up that day.

“Ambassador,” said the tall, thickly built blonde woman in front of him.

“General Keith! It's an honor!” Nodding deeply but not quite bowing, he pleasantly keep his eyes on the stone-faced brass in front of him. She really was a sight to behold in Logan's eyes, as her outfit was much like his but far fancier and more decorated.

“I'd come here to say much the same to you, but it's disappointing to see your lack of punctuality in this incident. Do you not understand the gravity of the situation in Newark?”

“I assume there are units capable of leveling much of the city if unopposed.” Logan wasn't smiling anymore.

“That's correct. Thankfully, they are opposed, but it would be much better if you were on the way by now. Was Ms. Ortiz distracting you?” She'd furrowed her brow after briefly glancing at the girl behind him in the cramped cockpit, and had a neutral looking expression that was tough for Logan to read.

“No. I can assure you, I had very good reason for delaying my departure.” Logan actually gulped as he said this, knowing that having made the commitment to discuss this was still probably the best option.

“Such a reason would be illuminating, at the very least.” The General was ice cold, but if Logan was honest with himself he was kind of liking that part.

“In light of the Eruption and its effects on the nation of Japan, specifically Tokyo-3, I considered it of vital importance that our former allies at NERV receive some form of aid.” Logan tried to speak fast enough to not be interrupted, but was unsuccessful.

“What aid were you able to provide from Delmarva?” A simple question, but carrying further implications.

“I was able to leave Delmarva and head directly to Tokyo-3, specifically by way of Mount Fuji. This was accomplished by fusing with the individual known as Steven Universe.”

“Fusing? Clarify that, please.” The polite but distant woman sounded somewhat interested for a change.

“Through the use of dance and Steven's magic powers, I was able to merge with the boy into one singular being. From there, I was able to use some of their magical technology to travel to Japan and physically aid the Evangelions in their battle against the Angels.”

“Was the battle successful?” The general seemed like her interest was doubly piqued.

“Yes.”

“Okay.” That was the last thing she said before her feed cut out.

United Arms Holding Cell (Aboard the Carrier)

Logan sat alone in a four-cornered room, with naught but a single table with a chair at it. The look of the place was much like his cockput but less fancy and high tech, and really all the walls contained were the door that he'd been ushered through, and the speaker above it. Ah, the speaker. As he understood, they were likely to ask him questions if this was the process he thought it might be. He was aware of its use, and how effective the depersonalization of talking to a speaker was at making sympathy seem out of reach.

“Well, I'd hoped this would go a little better,” he admitted.

Choice Time!

>Logan clammed up.  He wasn't going to speak to anyone without a lawyer.  This wouldn't win him any points with the UA, that's for sure.

>Logan spoke freely.  He would be prepared to answer their questions honestly.

>Logan got ready to lie his ass off and tell the Arms what he thought they'd want to hear.