both rengoku and tengen were priests sent to cleanse a nearby church that was haunted with people being tortured by a demon tengen got his revolvers and white priest outfit on and rengoku got his cross and sword with his book of prayers and both approached the church ready to cleanse the demon when they saw a succubus in front of them

Tengen: loading his revolvers with holy silver bullets

Rengoku: “...I sense a powerful demonic aura...” he says taking out his prayer book