Metal Warrior is a mysterious masked gimmick in Dragon Gate. The user of the gimmick wears a metal-esque mask with a full black body suit that resembles a jump suit.
The Metal Warrior was introduced when many Metal Warriors started attacking members of the WORLD-1 unit. On January, 2010, Naruki Doi, Naoki Tanizaki, Yasushi Kanda, Gamma and the members of the WARRIORS unit (CIMA, Dragon Kid, Genki Horiguchi, Ricochet and Ryo Saito) revealed themselves to be the attacking Metal Warriors, which led to the creation of Blood Warriors. The next Metal Warrior appearance occurred when the Blood Warriors announced that one of the members of Blood WARRIORS would be expelled from the stable. Originally, the expelled member was CIMA until Metal Warrior attacked Gamma with the rest of Blood Warriors, kicking Gamma out of the unit and giving his spot to Metal Warrior, who was revealed as Kzy.
Due to this fact though, many wrestlers have used the Metal Warrior outfit to disguise the return, or eventual alliance turns of wrestlers, usually unmasking after the fact. Naruki Doi used the gimmick when interfering in a 3-way trios tag team match between Mad Blankey, Dia. Hearts and Millenials, initially helping Dia. Hearts before betraying them and solidifying his allegiance to Mad Blankey.
As a general rule, Metal Warrior is always aligned with whatever the heel faction is in Dragon Gate. The only that time a face wrestler used this gimmick was when Ryo "Jimmy" Saito used the gimmick in a Prime Zone episode. In 2013, Metal Warrior wrestled some matches in the Dragon Gate Nex system later revealed as Don Fujii after costing Akira Tozawa a match with Jimmy Kagetora.