Koshirou Chikuma

Koshirou Chikuma is a disciplined martial artist who has practiced vacuum-based breathing techniques since childhood. Although he shares a sibling-like bond with Oboro, his loyalty belongs entirely to his master, Tenzen. This devotion drives him to prioritize orders above all else; he is willing to betray his closest companions or attempt to assassinate Gennosuke if commanded. His strategic intellect is matched by this capacity for ruthless obedience.