The former commander of the now defunct 4th Squadron of the Demon Slayers. Griff held a strong leadership position during the early days of Summoners' Hall which was only second to that of the Summoners of Old. He hammered the basics of battle into the new Summoners that had just joined with him， and grew to become a very capable Summoner himself. The red armor he wears， which he found while surveying the Agni Region， is believed to have been made through the forbidden research conducted by the ruined Agni Empire. Also， only a handful of people know the reason why the single digit number used by his Demon Slayers' squadron is no longer in use.