Alex Mallari Jr. as Four, AKA Ryo Tetsuda, once the heir to the powerful Zairon Principality before being framed by his stepmother for the murder of his father. Stoic and distant for the most part, Four is a master swordsman and martial artist. He can be incredibly ruthless, as well: he killed his former swordmaster and teacher in cold blood to send a message to his brother. He expresses himself through actions more than words.