This article is about a/an Mirror Monster in Kamen Rider Ryuki.

Hydragoons (ハイドラグーン Haidoragūn, Episode Final): Blue dragonfly monsters that are the evolved forms of Raydragoons, thusly the second evolution of Sheerghosts. Hydragoons are more dragonfly-like than the other forms and are much larger, their body and tail being at least 10 feet long. They are able to fly up to 900 kilometers per hour, launch their harpoon-like claws like rockets that will tow back anything snagged, and have fangs that can rip through steel.


Kamen Rider Ryuki: Episode Final

Hydragoon v Knight sizes

size comparison to Knight (tail continues out of frame)

One bursts out of a Raydragoon that Knight was fighting, chasing him into the sky and snagging him with a harpoon claw, dragging him back to it. Darkwing knocks Knight free, and he defeats the Hydragoon with his Final Vent.

Many more emerge from building windows into the real world in a massive swarm of Raydragoons and Hydragoons, attacking a crowd of civilians before Ryuki Survive and Knight Survive fly into the swarm on Dragranzer and Darkraider, easily taking out individual monsters but being severely outnumbered. Kamen Rider Ryuki: Episode Final

Kamen Rider Decade

Dozens of Hydragoons appeared fighting Ubume and Ittanmomen Makamou in an all-out battle among the various monster groups during the destruction of Natsumi's world. Rider War (episode)

Kamen Rider Wizard

Another massive swarm of Hydragoons joins Amadum's army of his strongest monsters to fight the Heisei Riders, most Riders taking out at least several in one way or another. Neverending Story

Kamen Rider Zi-O

A massive swarm of Hydragoons were one of the various monster groups that were summoned in the World of Zi-O due to Swartz merging all of the worlds of the Kamen Riders together. 2019: Vanishing Watches 2068: Ohma Time 2019: Apocalypse


  • The first Hydragoon's "eruption" from the Raydragoon is similar to the emerging method of Chestbursters from the Alien franchise.


See Also

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