Yes that could be true indeed. The Marked One will be sided by a wise advisor and a strong bodyguard, which means one person who is both an advisor and a bodyguard.
Or maybe Larian just has overseen to work out that part of the story later on.
I went to do some research in my libraby and ... hm hm...yes...hm...aha...hm hm...*more old-wizardlike mumbling

*...nope, I didn't find any manuscripts about the Divine One that were telling of the advisor and bodyguard.