Gunther is an evil machine weapon user and the tertiary, later true main antagonist of the sensational Warriors reboot. He's the new leader of the Nazi party. He was responsible for the hatred between all four clans and the corruption of Tigerstar.
He was born in San Francisco when his father noticed about the animal war uprising was about to commence. And so, when the four clans were founded, he built his robots and Nazi-war machines to affect the truces on all four clans making the clans hate each other for eternity. When Tigerstar was captured, he injected his heart with an evil Nazi-like formula that turned him evil and very secretive.