List of Kamen Rider: Dragon Knight Characters - Kamen Riders - Kamen Rider Onyx

Kamen Rider Onyx

Kamen Rider Onyx is a black-colored copy of Kamen Rider Dragon Knight armed with a black Japanese Dragon Advent Deck; he is the 3rd strongest Kamen Rider, and is stronger than Kamen Rider Dragon Knight. Onyx is a newly created Kamen Rider, which is why no other Rider recognized the armor, thus increasing the total number of Kamen Riders to 13. He first appeared to ambush Kit and knock him into Ventara. When Kit is taken down by Onyx, it turns out to be a nightmare. The next time Onyx shows up is actually Kit (as Dragon Knight) retransforming into the black-armored Onyx venting Wing Knight and confronting Siren. However, it turns out to be just another nightmare.

Onyx originally represented the struggle that Kit was going through, confronting Onyx when he was feeling useless because of his jealousy towards Kase and using Onyx's power when confronted by Xaviax about his father. This was due to a phenomenon that Chance and Price refer to as the Advent Beast's rage imposing its will on the Rider's mind.

When Kit is taken out of the Advent Void, Eubulon tries to give Kit the Onyx Advent Deck. Kit initially refuses to use it due to his nightmares, but accepts it when Eubulon and Kase reassure him that those events were only nightmares. Kit uses its power to help Len and the other Riders. He later confronts Adam, who has the Dragon Knight Deck, and fights him until Eubulon interrupts the battle. Kit joined forces with the Ventaran Riders, and worked with them to defeat Xaviax, first by defending Earth from attacking Mirror Monsters and also working to render Xaviax's teleporters useless via the virus used to negate them. Kit is present when the team travels en masse into Ventara to storm Xaviax's headquarters, and also joins the other twelve Riders in using the Link Vent to destroy the alien tyrant.

Kit retains the Onyx armor until the final episode of the series, when he reclaims the Dragon Knight Deck/armor when Eubulon gives him the choice of which Deck to use. The current whereabouts and user of the Onyx Deck, if one exists, are unknown.

With exactly the same design and Deck, Kamen Rider Onyx has the same combat potential as Dragon Knight, a balanced rider with a variety of cards at his disposal using his own dragon to help fight. Because Onyx is exactly the same as the Dragon Knight armor, Kit has no trouble using it. The Onyx Deck is unique among the Advent Decks as the dragon emblem on the Deck is black rather than gold. The only card the Onyx Deck appeared to lack was the Survive Mode Card. As every Rider was supposed to have a Survive Mode Card according to Kase when the Cards were introduced, it is unknown as to why Onyx lacks this Card since it was a newly created Deck and therefore should have had the Survive Mode Card among the others, since the Card would not have been left in the original base of the Kamen Riders, where the others, aside from those for Dragon Knight and Wing Knight, were left behind when Xaviax had infiltrated it.