Specifically in the terms of the game, it's a purifying....uhh almost like an area-effect buff. It keeps seraphim under his care from being tainted by malevolence, or like obsessive emotions that form from excessive weak-heartedness, regret, guilt, etc. It also purifies the land around him, but to a MUCH lesser degree. Mostly im playing it by ear, the game is not very specific

I guess if people have spiritual sense they'll be able to sense the peace and tranquility like uhhh idk a veil and know it's coming from him