Yeah, fictional characters live in a pretty starkly stratified society. There are, essentially, two things that can lift a character out of the ocean of faceless NPCs: having a name* and speaking lines.
Somewhat ironically, speaking lines also marks a pretty stark (financial) distinction for the actors who play a fictional character.
The twins’ names have never been mentioned (and I would have to check the script whether I even gave them any), but they’ve spoken plenty of lines, so they definitively can’t be treated (as badly) as easily replaceable extras. Their good looks add to that effect – but Gregory would perhaps felt awkward focusing on that under the prevailing circumstances.
Qualified for kid-glove-treatment, the twins aren’t confronted with an Eldritch Blast and a fully-loaded minigun aimed at them…but just with an Eldritch Blast and a Super Soaker. I guess technically the Eldritch Blast would be bad enough (or rather more than enough), but it doesn’t look like a gun, so there are no special rules/restrictions for it.
Gregory has little reason to feel bad about this set-up, though – let’s face it, the minigun would have clashed rather badly with the Alparka in terms of style, and the Alparka is obligatory. The Super Soaker gives off a playful vibe that fits in well with the rest of Gregory’s outfit. And it doesn’t look like the twins were about to offer a whole lot of resistance, anyway.
More on Monday.
* And only names mentioned on-screen qualify, in this regard. Having a name in the script or the end credits might be nice, but it does nothing for the level of empathy the audience feels towards a character.