I just think it's a regular Balduran guard to illustrate we are fighting the city guards and then causing the city to fall once we're the Dreamer's chosen, not meant to be anyone special. As I don't think it would be serving the story any good by showing us killing the Drows or other True Souls within the dreams, as the Dreamer sequences seem to be intentionally mysterious and misleading into making us believe they're just a classical Disney villain on the Absolute's side.

I am of belief there is more to the Dreamer than just black and white, good and evil. Especially because we get to customize the Dreamer, so it gives me belief they have a far more complex role to play than what the visions imply. Otherwise they could have just made a specific appearance for the Dreamer if their role was small or exclusive only to the evil side.

[Linked Image from bg3.wiki] Minthara's Compendium Of Issues