Knives

Knives is Vash's sinister twin brother and is the real hidden threat on the desert planet. It was Knives, not Vash, who had been responsible for "The Great Fall." He believes that humanity is a plague that must be exterminated because they survive by consuming the plants and all the planet's natural resources. He is doing all this because he is trying to get his brother on his side, as Vash is the only person who can stop him.