Shirou Kotomine

"Let me introduce myself, I'm Shirou Kotomine. This time, the grail... This wish is certainly right. That's why I have to make it happen. No matter how many lives will be trampled by it."

- Shirou.

Shirou Kotomine (シロウ・コトミネ) is the Master of Assassin of Red in the Great Holy Grail War of Fate/Apocrypha.

Identity
Shirou's real identity is (天草四郎時貞).

Background
As the Ruler-class Servant who emerged during the Third Holy Grail War. He remained materialized afterward and joined with the Church.

As the Mage's Association decided to seek one Master from the Church in order to have their involvement prove the legitimacy of their cause. Shirou was dispatched by the Church's Assembly of the Eighth Sacrament as one of the Masters of the Red Faction.

Personality
Shirou appears to be a good-natured man with an innocent smile; he is in actuality a schemer who would destroy his adversary without the slightest hesitation in order to fulfill his own ambition. He wants to make use of the Holy Grail War to fulfill his own wish, he wishes for humanity salvation.

Fate/Apocrypha
He is sent by the Church to observe the Holy Grail War and to participate as one of the Masters of the Red Faction. He leads and controls all Masters of the Red Faction; however, when he suggested having all the Red Faction have a unified frontal offense, Kairi Sisigou was the only one to reject this.

He views the servant Ruler as the biggest obstacle and plans for her elimination by ordering Lancer of Red to kill her. He has been shown talking with his Servant and Caster of Red in one scene in the novel. Caster has actively worked alongside Shirou and Assassin and has called Shirou "Master.”

Abilities
As part of the Church's Assembly of the Eighth Sacrament, Shirou is skilled at using Black Keys (黒鍵) and is an expert in Baptism Sacrament (洗礼咏唱).