Denji Kudou is a central character in the manga series 'Abara' by Tsutomu Nihei. In a world ravaged by monstrous beings known as Gaunas, Denji is a mysterious figure with the power to transform into a White Gauna. He is a brooding and enigmatic character, whose past is shrouded in mystery. Denji's role in the series is pivotal as he battles against the Black Gaunas and uncovers the secrets of his own origin. His complex personality and extraordinary abilities make him a compelling character in the dark, dystopian world of 'Abara'.