A wolf beastman with a very keen sense of smell who makes the wellbeing of Anima City his principal concern, possessing immense strength and regenerative abilities along with immortality and ability to turn into a giant wolf. Shirou is later revealed to be once a normal beastman in the city of Nirvasyl a millennia prior, killed by Raymond Sylvasta along with the other Nirvasyl residents when driven berserk. But Shiro gained his powers when revived from absorbing the blood of 1,000 Nirvasyl beastmen corpses, creating the myth of the Silver Wolf (銀狼, Ginrou) in dedicating his new life to protect beastmen from human atrocities.