The title should give the basic idea. However to be clear, this request is free of any change to the voice dialogue for Aloth. There is just a want for some help from someone far more skilled than I, to change the ingame model for Aloth.
Anyone who has added additional Player and Adventurer portraits should be able to figure out how to change even Aloth's portrait... and that applies as well to me.
Of course, someone 'could' change the voice along with it but that would take more time and resources than is perhaps warranted by the size of the audience such a mod would help.
The attached are what was created for the personal use of mine.
They are only to show the extent of the skills of mine, instead of suggesting some sort of limit.