The entire party needs to be together to change map areas (comparable in size to the first map in Divine Divinity), but other than that the main characters can separate. Any henchmen / companions will automatically follow their respective main character, unless you tell them to 'wait here' or send them to the shelter plane at the end of time to wait for you there.
Thanks Raze. I hope companions can have the same skills as the main chars do, so my sneaky PC can have a sneaky rogue companion so they can be sneaky together.
