Gaia Memories

A Gaia Drive is a mysterious device resembling a USB flash drive that contains all of the Earth's knowledge of what it represents. This enables its user to become a Dopants, or in some special cases a Kamen Rider. Every Gaia Drive is adorned with the first letter of its name, stylized to reflect the powers it imbues on its user. For example, the Injury Memory (acquired by Simon and Charlie before the series begins) resembles a broken bone in the shape of the letter I. In order to transform into a Dopant, the Gaia Drive is first inserted into a device called the L.C.O.G (Living Connector Setting Operation Gun), also called a Connect Shooter, which then produces a USB port-like tattoo on the user's skin called a Living Connector. Whenever the Gaia Drive is pressed onto the Living Connector, it enters the user's body and transforms the user into a Dopant. It is possible to use a Gaia Drive without a Living Connector however a side effect is that the user would later suffer intense physical pain after several uses.

This direct insertion will eventually drive its user insane from its addictive influence, which is why special belts called Memory Drivers have been developed for use by high ranking members of the Museum to filter out these and other side effects. This weakens the Dopant visibly, as such high-ranking Museum members use some of the strongest Gaia Drives, identified by their golden colors, to more than compensate for this weakening. These Gaia Memories seem to be even more dangerous than regular Gaia Memories as hinted in the series. Despite the benefits, there are those who dislike the use of Drivers and would very much prefer the poisoning than being weakened, like Doctor Isaka. It also seems that when used excessively, the user will slightly gain the Gaia Memory`s powers as hinted when Ryubee who held the Terror Drive for at least ten years seemed to be able to intimidate others as well as flashed purple eyes when doing so.

Kamen Riders utilize Gaia Drives that have been refined such that they can only be used in specialized Drive Driver belts, and the Gaia Drives used do not enter the body and channels power through the Driver. These kinds of Gaia Drives were created by Shroud during her time as Fumine Sonozaki. This refinement makes them resemble USB drives, rather than the ribcage design on Dopant Gaia Drives, but further weakens the power of the Drives, only allowing access to the Drive's full power during a Maximum Drive.

To defeat a Dopant, a Kamen Rider has to use one of its Maximum Drive finishing attacks to eject and destroy the Gaia Drive, resulting in what is called a Memory Break. Evolved Gaia Drives require a direct strike on its location within the Dopant's body to execute the Drive Break. If the Dopant does not have a Living Connector, a Drive Break will not occur, however the Gaia Drives will still be ejected from the user's body. Dopants who use Drive Drivers are not susceptible to Drive Breaks.

Double

 * Simon Holmes (left half side)
 * Joker Drive: The Joker Drive, also known as the Ace Drive, allows the user to increase fighting potential and enhances the users reflexes significantly, becoming the Skill Warrior. When used, half of Kamen Rider Double Detective becomes the black Ace Left Half. When the Joker Drive is placed in the Maximum Slot on the Double Driver, it allows Kamen Rider Double Detective to split into two halves to deliver an elemental-powered Maximum Drive attack. The Joker Memory can also be used with the Lost Driver to allow Simon to individually transform into Kamen Rider Joker.
 * Metal Drive: The Metal Drive, also known as the Steel Drive or the Fighter Drive, empowers the user with great strength and magnified resistance to physical harm, becoming the Superpowered Warrior. When used, half of Kamen Rider Double Detective becomes the silver Fighting Left Half. When the Metal Drive is placed in the Maximum Slot on the Metal Shaft, it allows Kamen Rider Double Detective to infuse the tips of the Metal Shaft with an elemental-powered Maximum Drive attack.
 * Trigger Drive: The Trigger Drive, also known as the Sniper Drive, turns the user into an expert marksman, becoming the Gun Warrior. When used, half of Kamen Rider Double Detective becomes the blue Sniping Left Half. When the Trigger Memory is placed in the Maximum Slot on the Trigger Magnum, it allows Kamen Rider Double Detective to fire an elemental-powered Maximum Drive attack.