Rai has a natural and rare affinity to blood. With it comes certain abilities that can only be used by those who, according to Regis, "govern blood". He is also able to sense the origins of powers as seen with M-21's werewolf heart. He is the only person that met with M-21 and realized this without a thorough physical examination of his body. The blood Rai creates and manipulates has certain properties, due to the fact is drawn from his life force and infused with his powerful aura. The blood is actually quasi-solid, and is able to exert enormous pressure and absorb different types of energy. His control over blood is so profound that even simply saying that Ignes no longer had the right to look at him caused her eyes to rupture and bleed violently.