Matthew Decker (mirror)

In the mirror universe, Admiral Matthew Decker was the Grand Admiral in the Imperial Starfleet and the commanding officer of the ISS Constellation in the 2270s.

In 2277, under orders from Empress Hoshi Sato III, Decker led a fleet to the Terra Nova system in the hopes of ambushing and destroying the ISS Enterprise. When the Enterprise arrived in the system, Admiral Spock quickly surrendered and had himself beamed aboard the Constellation to hear the charges laid against him by Decker.

Unfortunately, Spock had managed to persuade the Constellation's first officer, Commander Hiromi Takeshewada, to lead a mutiny and assumed command of the Constellation after shooting Decker, in revenge for all the taunts he made against her.