N-Gamio-Zeda is the king of the Gurongi in the World of Kuuga and an antagonist in Kamen Rider Decade.
Kamen Rider Decade
Having been sealed in the past, the Gurongi attempted to unseal him with a Sacred Gegeru, targeting five police women without spilling blood to revive him. To foil this, Tsukasa Kadoya used Ai as bait to lure the Gurongi out and gives her a nose bleed to ruin the Gegeru. However, the effects of the distortion revive Gamio anyways, and he uses his Miasmic Aura to convert every human corpse into a Gurongi. After absorbing the remaining Gurongi in a last ditch effort to defeat the Kamen Riders, Gamio was destroyed by Kuuga and Decade performing a combo attack.
OOO, Den-O, All Riders: Let's Go Kamen Riders
After Shocker emerged as a global power in an altered timeline created by Ankh leaving a Core Medal out in the past, N-Gamio-Zeda was one of the future Kamen Rider foes recruited to serve on Shocker's leadership council.
Super Hero Taisen GP Kamen Rider 3
After history was altered by Shocker's History Modifying Machine to ensure that Shocker would conquer the world by having Kamen Rider 3 kill the Double Riders in 1973, N-Gamio-Zeda was among the many monsters that worked for the evil organization in this alternate timeline created by. During the final battle against the Kamen Riders, N-Gamio-Zeda was destroyed by Blade's Lightning Blast.