Sword Saint

A Sword Saint (剣聖, Kensei) is a title reserved for who are capable of elevating their prowess in  to newfound heights—being considered a potential candidate for a Warrior God (武神, Bushin).

Rōnin
A Rōnin (浪人, Rōnin; lit. "Wanderer")

Kenki
A Kenki (剣鬼, Kenki; lit. "Sword Devil")