how would the mechanical anatomy of such a deed even work?
Some might say, "the show and game are just plain weird and rely on humor." But honestly, everyone in that world can stretch away from their limbs a bit, but if they go too far, like more than two heads' length, it actually hurts. Anything less than that just tickles, as shown in one of the endings where... well, she gets dismembered.
is ee-na's PUSSY and ANUS floating in the middle shape?
Yeah, they float, just like her hips and pelvis. There's actually some anon posting an animation of that in almost all our threads (porn). It's pretty cool, but before that, the art from the show and the "Upgradeable" edition of the game shows that Ena and others with similar body types (not everyone has floating limbs) share the same idea.
how do you take clothes off of that?
I can’t really answer that, you got that one. Any character that looks like they change outfits is actually a totally different version from another universe in a different realm. But it seems like they can switch up their clothes and buy new stuff too. Like, in the game, she can change her hats, throw on a jacket, and all that kind of thing. If you can add them, then taking them off must be possible too.
The red and grey Ena is not the same as the Ena from the show. This is in the production artwork and lore itself. The blue one is a different character within the same multiverse.
Why not both?