Zenitsu Agatsuma’s Strengths and Abilities in Demon Slayer Zenitsu ’s main ability in Demon Slayer is the swift and effective Thunder Breathing technique. Among its traditional six forms, Zenitsu can only use the first form—Thunderclap and Flash. This lets him unsheathe his sword and dash forward at great speeds to cut through his opponents. With the Demon Slayer anime adaptation’s Entertainment District arc, the series is at the forefront of contemporary animanga news. Recent episodes have thrust the main cast of Zenitsu , Tanjiro ... Zenitsu Agatsuma is a main character and Demon Slayer in the manga and anime series Kimetsu no Yaiba. He is a cowardly and weak-willed boy who has a crush on Nezuko Kamado and a fighting style based on lightning. Zenitsu Agatsuma Age: 16 Birthday: September 3 Height: 164.5 cm Weight: 58 kg Zenitsu Agatsuma is a member of the Demon Killing Corps and a traveling companion of Kamado Tanjirou. Zenitsu has fair skin and downward-sloped, scared-looking eyes that fade from soft brown to gold.