He is the known to be the youngest and most talented priest. He is also the Contracted Priest and lover as the series talks about their past of Itsuki Yamagami. Itsuki wanted a priest who is the strongest to make contract so she can enter heaven faster and the answer is him a student who is roughly 19 years in age at that time. His specialty is archery. With that he provides support to Itsuki when she is on the killing mode.