You might find this mod helpful.
Though I'm not quite sure what you mean.
Why would you want a portrait of him? Portraits of people only matter if you can have that person in your party or as your PC, otherwise you cannot see a portrait.
Or do you simply want to have his portrait instead of whatever portrait you have for your PC, which would be a little odd since he doesn't look like any PCs.
- bencejedi likes this