One of the strongest members of C3. He is said to be the “Ace of C3” and is Toma’s human experiment in an attempt to create a 9th Servamp. Tsurugi seems to be very confident and self reliant. He calls most of his collegues nicknames with the honorific "-chan". Althogh he states that he only does the work he is paid for, he seems having fun in fighting against Tsubaki. He also states that he has no pride at all and will do everything for money - he calls him self a shoe licking. 