The main character is a female character.

[Inca female who lived naked]

Where can I download the mode that changes Arthur Morgan to a sexy woman?

[Lovecraft's Cat]

You know the actor who plays Arthur did dozens of hours of voice acting and motion capture, right? I highly doubt it's even possible to replace him with a lady in post. Especially not with a mod.

[Cooperal]

Originally posted by Scyth:

You know the actor who plays Arthur did dozens of hours of voice acting and motion capture, right? I highly doubt it's even possible to replace him with a lady in post. Especially not with a mod.

Yeah whatever. The fact that you will still have Roger Clark's voice and motion capture is so obvious that it should go without saying, but if it works for Jack it will probably work even better for a full grown woman.
https://www.youtube.com/watch?v=NiWLNGuM-mc

I haven't done model swapping in RDR2 myself but just like other R* games there's more than one way of streamlining the process. Searching for either a trainer (cheat menu) or a save editor would probably be the easiest ways. I'm sure there are multiple to pick from but I can't really offer an opinion on which is best. Better to seek out a popular consensus on that.

[Zwut]

This is the kind of thing you are looking for?

https://www.mod-rdr.com/downloads/rdr2/mods/7-lennys-simple-trainer/

As others have said, that sexy woman will more than likely have the manliest of manly voices.

[Lovecraft's Cat]

Well that's just degenerate. What else can I say. Bye.

[DargonBlak]

Being able to run a female as a main character would be worthy DLC.

Like many - i would rather watch a female run around and crush opponents than a man - rather out-dated to only have a male protagonist