Roi is calm, cool, collected, and introverted, constantly maintaining an aura of fearlessness. He cares little for the well-being of those around him unless it is a mother or child, and is unflinching in his pursuit of his goals; however, in spite of his cold and ruthless demeanor, he is an honorable warrior who maintains his own set of morals and disciplines. He despises fighting dirty and refuses to use firearms, deeming them to be unworthy of a "true warrior", though he will still use ranged attacks if they can be made to originate from a melee weapon.