ike Souma, Kiriya is also a Soul Blader, who uses Seena\'s \"heart\" as a sword. Kiriya is completely oblivious to Kureha\'s and Seena\'s feelings for him, the latter being one of his childhood friends.

He later forms a close bond with an elf named Xecty, who is later revealed to be an artificial recreation of the Elven Queen. Until Xecty\'s death, he was confident in his mission to have Saionji admit defeat. Since the start of the war, his attitude shifted from his shy and quiet self, to a rash and emotional state, who sees that fighting is the only way to win (the complete opposite to Souma\'s change of behavior).

He is later revealed to hold Souma\'s Holy Grail, Souma\'s Ultimate Soul Blade. The one who holds his Holy Grail is Xecty.