Curio

A close friend of Francisco and a skilled swordsman who had lost the use of his right eye. He is also Juliet's fencing teacher, and according to him, a sword reflects the soul of its owner. His preferred weapons are axes or polearms. His scarred visage originated from protecting a younger rebellious Juliet from receiving punishment from members of the Carabinieri. Though he blames his own foolhardiness for the blow, Juliet's frustration from that time gave birth to her alter ego, The Red Whirlwind.

(Souce: Wikipedia)