All-female Phantom Thieves is an okay idea, but I feel like Ryuji is an important part of the team. My proposal: the Metaverse turns you into a girl. “What the eff?”
Catgirl Morgana is already a fandom cliche. No further adjustments there.
Ann’s teasing is relentless, but this may or may not lead into her teaching real-world Ryuji about makeup.
Yusuke doesn’t notice the change until it’s pointed out to her.
Goro is somehow still male, and no one can figure out how. He says he thought that was normal. Then he lets out Loki and turns female, because Robin Hood was just another mask.
Fake!Igor is creepier than ever, and vaguely horny in a deniable faux-dignified way. Turns out Yaldabaoth wants to be a maledom with a harem. In the final battle, this revelation gets him simultaneously burned, nuked, electrocuted, grenaded, and barraged with cutting winds. (Yusuke is too baffled to be offended.)