In the new update we are introduced to kay/o a sentient robot or a "machine of war" there is nothing biological about him.

Enter sage we know her as a healer class she can heal any agent that is hurt or injured and revive any fallen agent including Kay/o...

This is just my understanding of healing, so correct me if I am wrong, it is to increase the biological healing factor of the target. Since Kay/o is a robot and he is man made he shouldn't have any healing factors, since he is machine, so how does sage heal him then?

What if sage doesn't heal but reverses time for all the agents to before they were injured or shot dead. Also her other ability to slow orb is not a ball of ice but a area affect that slows down time. And the barrier wall (this could be a stretch) is a barrier that halts time that's why you can't shoot through it and still walk on top of it at the same time. And this barrier can only be maintained for a certain amount of time that is why when it breaks there is no evidence of it ever being there.

This is just an idea I had while I was playing the game I could just be overthinking the game.:)