I noticed a teammate trapped in a laser during the Big Iron fight in Ghosts in the Machine, and tried to save them by standing nearby and activating Angelic Aura. Unfortunately, I was too slow to prevent them from getting killed. While standing there my aura broke very quickly, as if the beam hitting their body was subtracting health from it.
Someone should test --
Get a kitty person and a victim. King of Ashes mission.
Have the victim die while touching shadow fire.
Have the kitty person use the aura next to body.
Aura lasts five seconds without an ultimate, eight seconds with ultimate.