Zenitsu Agatsuma

Zenitsu Agatsuma is one of the main characters in 'Demon Slayer: Kimetsu no Yaiba.' Initially portrayed as cowardly and anxious, Zenitsu is a skilled demon slayer with exceptional speed and reflexes, particularly when he is unconscious. His character develops significantly throughout the series as he faces various demons alongside Tanjiro and Inosuke. Zenitsu wields the Thunder Breathing techniques, and his bravery often shines through in moments of crisis, proving that he is a reliable ally.