Live action TV
Description
Gainagisukan is a character who appears in the third episode of Kamen Rider BLACK RX, titled RX vs. the Wind Knight. He is a member of the Monster Demon Humanoid Battalion and holds the rank of Monster Fighting Soldier within that organization.

Known by the title of Wind Knight, Gainagisukan is a figure of considerable skill and pride. His appearance is marked by long horns extending from the sides of his head, which is likely a helmet with a visor-like covering for his eyes. In combat, he demonstrates exceptional ability in both horsemanship and spearmanship, fighting from the back of a dark horse. His signature ability is a powerful technique called the Wind Demon Beam Hurricane, which generates a violent gale with a wind speed of one hundred meters per second.

Gainagisukan is defined by a strong sense of honor and a preference for fair, face-to-face duels. He is a proud warrior who respects a worthy opponent. This is shown when he deliberately gives Kotaro Minami, the hero, the opportunity to transform into Kamen Rider BLACK RX during their confrontation. Despite this honorable streak, he is utterly loyal to the Crisis Empire and reveres the Crisis Emperor as an almighty and all-knowing god. He shows no mercy to those who defy the Emperor, either enslaving or killing them without hesitation. He is also the supervisor of a water excavation site in the Wind Desert of the Monster World, where slaves labor to find water, a resource as valuable as gold in that realm.

In the story, Gainagisukan is summoned from the Monster World by the commander Bossgan to eliminate Kotaro Minami. He captures three young friends of Kotaro but releases them without using them as hostages, again demonstrating his code of honor. He then uses his power to transport Kotaro to the Monster World, intending to fight him there. A key aspect of his character is a specific weakness: the sound of a music box, which humans find pleasant, is heard by him as a painful and discordant noise that causes him great suffering. During his first encounter, Kotaro accidentally triggers this weakness with a music box pendant, allowing him to escape.

Despite this setback, Gainagisukan eventually gets his desired duel. He faces Kamen Rider BLACK RX in a direct confrontation. Although he fights with all his skill, he is ultimately overpowered and struck by the Revolcrasher finisher. Before disappearing, he accepts his defeat with dignity, leaving behind words that acknowledge his loss, and perishes with his pride intact.
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