I find that hard to believe to be honest. Why specify one if it's some vague hair program.
And why does it show up only here.
And why haven't we seen Jane anywhere else to my knowledge.
If it's about Ann why aren't there any files correlating to Ryuji or Morgana?
This string of text, which is all we have, is from within the stage files, known as .lvds. There's an error in their coding that causes these files, when saved, to record random junk data that was recently worked on to fill otherwise empty space in their code. The only reason we're getting any of this data at all is because it was worked on shortly before they saved the .lvd.
Considering Joker, Brave, and most likely Jane, are in development right now, it makes sense that their files will have been ones that were recently worked on. Also, before this leak, we only had one instance of Joker and Brave in the game as well.
In my opinion, those two were far enough for in-game testing, hence their parameters and stuff already being in the game, whereas Jane is early on enough where she's not ready for in game testing. They're still developing her animations and hair physics it seems.
If we're arguing this is files for hair for Ann, .mhcp files are just files used for modeling and animating hair. Online there exist variations on the file used for different kinds of hair intended for use as a template. They probably just grabbed a template for ponytails and used it to create Ann's hair, because there's not a lot of point to creating a file specifically for two pigtails when they can just copypaste the ponytail base within the file and have it work just fine.
As for why there wouldn't be Ryuji/Morgana files, that goes back to the way they were obtained. This person was just working on Ann's files before they updated a .lvd file and wasn't fiddling with the other two models.
Personally though, I think it's much more likely for this to be a different codename entirely and not related to Joker and Ann at all.
I also mentioned this earlier but Smash is really inconsistent when it comes to the way it treats certain alternates. Olimar and Ridley are some of the more notable instances of where the location of their alts just don't match up with how they're usually handled. Whatever it is for, I don't think the specific costume location really matters that much in the long run.
Alt costumes yes, but with genderswap characters they've been consistent. It alternates every other costume. There's no doubt in my mind this file has no bearing on a female Joker. If it does happen, it'd be completely unrelated to this particular file.
