Got the game today. Absolutely loving it. Best game I've played in ages, but one thing that's really annoying me is this weird purple glow around all my party members.

I know it doesn't hinder the gameplay at all, but it is really offputting, and quite distracting. Actually, it kind of reminds me of the halo from Fable, which I also found very annoying.

Does anyone know what this is, and how/if it can be stopped?

You probably have a sustained skill active. Just disable the skill and the glow should go away.

You're using the bard, it's one of her skills.

LOL Get used to weird glows around your people, those are auras they help you kill things and not die.

They are purple and purple is good. It means you won't die as easily against monsters.