He is a mutated human from a long lost war his only goals are to collect blood for his conception and use and so he uses the blood so he can admit an infinite blood gas from his gas mask and he can use it to his advantage like using it to stop people's airways and using the blood particles in the air to make blood weapons and even blood creatures the more blood he gets the more stronger all of his abilities become he's almost invincible as his body is made out of blood gas letting him regenerate