Gynagiskhan, also known as The Knight of Wind, is an insectoid-like horseman with sensitive hearing who used a glaive in battle and manipulate winds up to 100 mph. He brought Kotaro and his friends into the Desert of Fierce Winds where Walter and followers were exiled. After killing Walter, Gynagiskhan battles RX with Reiko's musical necklace disrupted Gynagiskhan enough for RX to kill him with the Revolcane. He returned in the movie, Kamen Rider Black RX, to assist Deathgaron, United Triplon, and Musarabisara into attacking the Kamen Riders only to be destroyed by a team Rider Kick.

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