I know that doubles are not allowed, but I have a question regarding a canon AU. Specifically, I'm wondering about Persona 3, which has two alternate characters who could be picked as main character (at least in the portable version). One - the female protagonist - is already playing here. Would it be permissible for someone to play the male protagonist? Although the two protagonists are parallel, arguably they are not the same person, just as a male or female, and I know a lot of people (your Hamuko included) that they were twins, and that one of them died along with their parents - which twin died and which one survived, of course, depends on if you pick the male or female protagonist in Persona 3 Portable.

Does this still count as doubling characters, or are they sufficiently different that this is still permissible? Thanks for your time! :)

_{And as a side note, I did ask Hamuko's player if she minded someone playing the male protagonist from P3, and she does not.}