kotomine risei
Kotomine Kirei's 80 year old father, Risei is a priest in the Church and the regulator of the third and fourth Holy Grail Wars.
A friend of Toosaka Tokiomi.
See also
- Kotomine Kirei
- Type-Moon wiki (spoilers): http://typemoon.wikia.com/wiki/Kotomine_Risei