Zero

Zero (零 Zero) is the main character alongside Kurohime. He is known for quick drawing four guns at lightning fast speeds, earning him the nickname Zero of the Superfast Quadruple Guns. He has a strong sense of justice, believing that "the gun is the sword of justice," instilled in him when rescued by Kurohime as a child. This prevents him from killing; instead, he disarms or immobilizes the enemies.