Kiren is the disciple of one of the best boxers ever Kazo,and Kiren his footwork is the fastest ever in boxing and his strength and endurance are extremely good and he switches between multiple boxing styles bullet which uses jabs that is extremely fast and a barrage of them, Kimura which lets him use a special ability where when he hits you in the stomach it slows you down more than usual, Hands low style which uses amazing footwork and extreme focus but has horrible guard.