I posted this in an earlier thread for a specific artist, so I'll post it here:

My "request" is more of depicting a rather unconventional concept, with not much care for what characters get used.

Basically take two rather different-looking characters (e.g. Rin Tohsaka and Luvia Edelfelt), have them decapitated and/or debreasted in some manner whether intentional or accidental, and then afterwards their parts are either put on display or in a casket or whatever, but the parts get mixed up for whatever reason and each girl's head and/or torso and/or breasts (however you want to mix them up) get mistakenly "allocated" as having originated from the the opposite girl.

So using my example characters of Rin Tohsaka and Luvia Edelfelt, the idea is that the end result could be things like Rin's head ends up being paired with Luvia's torso and/or breasts, and Luvia's head paired with Rin's torso and/or breasts. If name tags and/or labels are included, then we can go even further and optionally mix that up as well, labeling Rin's head with Luvia's torso as "Luvia" and Luvia with Rin's torso as "Rin" or the like.

Of course, since depicting multiple different characters in a single image is apparently difficult for AI at this time, this would likely require multiple separate images (or images combined together after-the-fact, though that can strip out embedded metadata)

Attached is a random unrelated fan image of Rin and Luvia demonstrating what I mean by "two rather different-looking characters".