Maybe he's a playable NPC, so that's why he can see and control quest popups? He clearly isn't from the MC's world and he doesn't know that this is a video game in the MC's world. It's whether or we're gonna go with the classic chosen ones in a world with an RPG system. If we're going with the latter, I hope there'll be others like the guy, (forgot his name already) who can interact with the RPG elements and have different attitudes and uses for it. It'll up the spice factor.