When GENM Corporation was in the middle of the development of ten or so games, a virus spread out through all of them and proliferated enough to break into reality. This virus became known as the Bugster Virus and this day was known from then on as Zero Day, when thousands of people succumbed to it. As CEO, Dan took it upon himself to work with the Department of Health to come up with a cure for the disease, which led to the creation of the Gamer Driver and it's Gashats.
Personality
As CEO of GENM Corporation, Dan appears to be comfortable in his role and more than willing to help out whoever needs it. He's able to easily read people's intentions and hearts, and uses it to his advantage. He's shown to be quite sociable and he gets along with almost everybody.
Beyond the surface lies a cold and calculating figure who seems to be running an experiment involving the Riders and Bugsters. He believes himself to be the only one truly capable of grasping whatever is going on, even when it's proven to the contrary.
Using the Proto Mighty Action X Gashat with the Gamer Driver, Kuroto transforms into Kamen Rider Genm.
Genm appears as a dark palette swap counterpart of Kamen Rider Ex-Aid.