The overseer was appointed during the previous Holy Grail War and is currently overseeing the current Holy Grail War. Originally, he was a priest assigned to the Assembly of the Eighth Sacrament, but the person tasked with supervising the last Holy Grail War was relieved of their charge, so he was sent to replace them. Due to the difficult times they live in, he cannot conduct his activities openly in Japan, which is why he approached Tsukumo Fujimiya to participate. After hearing Tsukumo's conditions, he obtained the sheath of the holy sword for her to use as a summoning catalyst, though it was only a replica. 

Im looking for a Stren/ stringent voice around with Med-Deep or Deep