by Inikyu » 10 Jun 2014, 03:26
In this beta as far as I know, you can only dismiss them and they will slowly heals over time or you can just let them passed out and they will slowly heals (I usually dismiss them when they're at 50% of their hp, most of the time, I never use my partner because I literally forgot I have several.)
There's no auto revive for partner, you have to wait for their health to be restored to the max if they have passed out, so I can only say is that try not let them die and if you're cautious you can dismiss them before they reach less than 25% of their hp.
There's no other way around this and there's no hp items that can be consumable to heal their hp.