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. Learn about Zenitsu Agatsuma , a Demon Slayer with yellow hair and eyes, who can fight powerfully while asleep. Discover his personality, background, Thunder Breathing technique, and role in the anime series ‘Demon Slayer: Kimetsu no Yaiba’. 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 ... Cut through the night where demons dwell. 2021 TV Anime. Streaming on Crunchyroll and Funimation.