An Old Blood who works alongside the Company within the Special Zone. Cain is a very strong vampire who has the ability to change into a blue wolf. He is known as a hero of the Kowloon Shock, Retainer of the Warlock family, the Knight of King Azami, and Cain the Blue Wolf. He is of the same bloodline as Cassandra and had served the Warlock family before her betrayal. He was also one of Alice's guardians before she died at the hands of Cassandra. He is now a loyal servant to Sei.