Kain is a tremendously powerful swordsman who has immense potential to overcome even the greatest swordsman. Even at the age of sixteen, his physical strength is almost equivalent to that of a vice admiral and Navy defeated a veteran himself with absolute power and technique alone. Kain is one of the fastest espadachims worldwide. Kain had several occasions in which he showed his speed to use the sword being able to face a master in melee at the same speed.