Kouhei Nikaidou

Kouhei Nikaidou, one half of the infamous 'Nikaidou Brothers' alongside his twin Youhei, served under the 7th Division of the Imperial Japanese Army. After witnessing his brother's death at the hands of Sugimoto, Kouhei's sanity shattered completely, transforming him into a relentless agent of revenge. Despite losing multiple limbs and even his ears across brutal confrontations, he returned each time equipped with custom prosthetics concealing deadly weapons. Ravaged by morphine addiction and haunting hallucinations, he stands as one of the most psychologically fractured and dangerous figures in the series.