|“||I am of space and this planet's law does not apply to me. The unchangeable law that rules over the whole universe, there is only ONE!||„|
|~ Kamen Rider Ginga to Another Kiva.|
|“||I have come to destroy everything you hold dear.||„|
|~ Kamen Rider Ginga after arriving on Earth.|
Kamen Rider Ginga is a Kamen Rider from space seeking to conquer the entire universe and a major antagonist in Kamen Rider Zi-O. He is one of the Kamen Riders who emerged from the timeline created due to Sougo and Geiz's meddling. He is extremely powerful, able to easily overpower Zi-O Trinity, and because of his immense strength, he believes he has the right to rule over everything in the universe.
Kamen Rider Ginga emerged from a distortion caused by Zi-O and co.'s alterations to the timeline.
Kamen Rider Ginga arrived on Earth via a meteor during the Riders' fight against Another Kiva, crashing into a nearby hillside. Kamen Rider Ginga then emerged and attacked both the Kamen Riders and the Time Jackers with an energy blast, announcing that he will be the one to destroy the universe. Sougo, Geiz and Woz transform into Zi-O Trinity to face him, but Kamen Rider Ginga easily overpowers Zi-O Trinity with little effort.
Teaming up with the Time Jackers, Woz is able to incapacitate Ginga by blocking out the source of his power, the sun, forcing him into temporary hibernation. After Ginga awoke again, he returned to rampaging until he was confronted by Zi-O, Geiz and Woz again. Ginga attacked the three Riders but, rather than fusing into Zi-O Trinity again, the three instead all performed their Rider Kicks separately and with their combined power were able to defeat Ginga, forcing him to flee into space in a beam of light that left behind the Ginga Ridewatch.
- Kamen Rider Ginga's voice actor Tomokazu Sugita is also known for voicing an Ultraman with the same name as Ginga, Ultraman Ginga.
- Sugita is also known for voicing the Kivat family and, seemingly coincidentally, Ginga first appears during the Another Kiva arc.