Hunter Elio was a hunter of the Healing Church before he was killed by a beast.
Hunter Elio came to Priest Clement for blessings, multiple times each week when he saw, and hear things others could not.
Hunter Elio even heard the cry and voice of a child. Elio was taken down by a beast in the sewers. When he could still speak, Elio warned Clement to fear the Old Blood.
Elio's death triggered Clement's anger and he started to be suspicious about the Old Blood and even the church itself.