this drabble's one of the ones i made on a whim, though it started out as a small comic, and i don't have a real explanation of where these two are or how they got here
best guess, Shadow Dedede's castle, Scorpio went to do his thing, and Hallow followed him

Scorpio is Mirror Taranza, Hallow is Mirror Marx
Lico/"big brother" is Shadow Galacta, who, currently, is the only one in Mirror World that likes Hallow. (also, a different word was used to describe him, with the same meaning, but...i felt awkward about leaving it in.)
Hopefully the other two mentioned are obvious

also, Hallow has a giant crush on Scorpio, but his advances are unrecognized and unwanted.
spoiler alert: nothing ever comes from it either, and he eventually gives up

BAM!

Scorpio's hand futilely slammed against the wall. Tears were forming at his two, main eyes.
"AUGH! No way out!", he shouted, growling slightly, "We're trapped..."

"...w-well...it's not so bad, i-is it...?"

He whipped around to face the noddy he was trapped with, scowling. "Not so bad!?"

"I-I mean, at least we're together, r-right?", Hallow quickly attempted to remedy, his face turning a violent shade of red as he spoke.

The floralian scoffed, "Yea...just who I want to be with - the guy on Shadow's hate list, 'cause he's sharing the 'hero' title with him."

Hallow looked away, turning even redder.

"..." After a moment, Scorpio sunk to the ground with a groan. He buried his face into a pair of hands, wrapping the other four around himself. "I can't believe I got trapped...Wish Master was here...he could get me out..."

Hallow fidgeted awkwardly, wishing he could reach a wing over to comfort the other...
...but that'd take up too much of the already small space they had.

There had to be something else they could do, to bide time if nothing else.
He was fully confident Lico would come rescue them soon, they just needed to not panic.

"...w...why do you work for him anyway?", he suddenly asked, a rather...impulsive and hopeful idea forming in his head.

"-hm?"

"D-DMK, I mean...
He can't be a good boss, right?"

"And since when is any of that your business?", Scorpio growled, shooting a glare that made the other flinch.

...When no response came, he sighed unhappily.
"What else was I supposed to do anyway? I needed protection, and her majesty..." He trailed off.
Upon realizing he had gone quiet, he then added, "I can't leave either; Master's goons would just hunt me down if I tried to do so without his permission, and I'm 'too valuable' to give up."

Hallow gulped, taking the information in.
"...w-well...", he started slowly, watching the spider, whom had taken to staring at the floor, "...y-you could join me and big brother. We could protect you."

His company looked up at him again, with an expression of disbelief this time. "Really? Two of the biggest enemies to my Master, who would slaughter any of his minions without a second thought? Gee, I certainly feel safe now..."

"I-I wouldn't-"

"You have.", Scorpio replied bitterly. The last two words died in Hallow's throat. "You've killed them in fits of revenge, though everyone else generally believes otherwise.
Don't think I don't know that."

He shifted, averting his gaze in shame. He couldn't deny killing before, but...
"...Y-you really would be safe with us though", he protested feebly, "B-brother wouldn't hurt you, if I asked him not to..."

"Oh? And what proof do you have?"

"...I-I trust him."

"Well, I don't. And, frankly, I don't trust YOU either."

"B-but-!"

"As far as I'm concerned", the spy continued, "you two are just planning to get my trust so you can kill me."
...Okay, maybe that was giving the duo far too much credit, but it happens.
He knew it did; it was his job, after all.

"W-we'd never..."

But it was about as useless as pounding on the walls some more.
Scorpio turned away, angry and resigned. He almost gave an aura of daring - keep pushing your luck, give him an excuse, any excuse, to hurt you. To yell at you.
To work off this extra stress that was gathering in his gut...

He could already feel the lashings he'd get for getting trapped, hear DMK's angered yelling...

Hallow feebly backed into a corner, wishing he could become smaller, or disappear entirely.
His intentions had been misinterpreted entirely, and there's no way he could have made himself look like a bigger fool...

The only comfort he had was that Lico would be here soon...