Zamsher is an antagonist in Ultraman Mebius.
Zamsher first appeared in episode 16, where he is first seen fighting and killing two Alien Magmas. He later confronted an Alien Valky, and both landed on Earth to fight. Mirai noticed their duel and went to investigate.
After Zamsher destroyed Alien Valky, Mirai transformed into Ultraman Mebius and fought Zamsher in a swordfight. While Zamsher slashed Mebius' sword in two, Serizawa transformed into Ultraman Hikari and destroyed Zamsher's sword. With that, Zamsher left.
Zamsher later returned when Alien Empera was invading Earth with his Inpelaizers. He assisted GUYS in defending their base and destroyed one of the two Inpelaizers attacking the base. Later, when Empera himself arrived on Earth to conquer it, Zamsher fought against him alongside Ultraman Hikari and sacrificed himself to protect GUYS base.
- His design is themed after the Sengoku era in Japan.