The Ultra Operation is a device or technique used in Ultraman Dual, to transform humans into Ultras.
Nature
The Ultra Operation seemingly replicates the process that transformed the original humanoid ancestors of the Ultras into the first generation of Ultras. It is also capable of transplanting knowledge, information, and science into the mind of the user, but as a side effect, they will begin to lose their memories of their time as a human, and possibly their humanity, as symbolized by the fact that people who undergo this process lose the ability to cry. The amount of memory loss depends on how much or how little information is implanted. Users are divided into two groups based on their degree of progression, First Step and Second Step.
History
When the Ultra Saint came to Earth, and took volunteers, the Land of Light Enclave, to help fight the Alliance of Aliens attacks M78, many underwent the operation to be able to help fight.
Usage
First Step
Those who have undergone the operation once. Most appear as all silver Ultras from head to toe. This is a testimony of noncombatants with red lines appearing only on those with a talent for combat.
Second Step
Those who have undergone the operation more than once. Transformation is less arduous than before, fighting power is also increased and information from the Land of Light can be removed easier. The main disadvantage is that excessive operation will destroy the original personality and the user may never be able to return to being human. However, it is believed that the power of Mother of Ultra may be able to reverse this.
Dual Charge Changer
In the state induced by the Ultra Operation, there is no transformation item to become a giant. Instead, the individual uses, the device called the Dual Charge Changer, to gain the energy to become a giant. This bracelet transforms the emotional support for 'Ultraman' from people into energy, therefore without the support of a populace, it is impossible to become a giant. This energy can also be used during combat to supply the combatant with energy.
This also means if the user does not defeat his opponent in time, and support wavers his energy will drop, or worse even fall into a negative spiral, draining their power. Once all the energy is gone, the user will remain an Ultraman until they undo the transformation. For these reasons it acts like a Color Timer.
Also, the intent of 'Rejection' can be added to this energy, which then cannot be used for transformation. However if too much appears after transformation it risks forcing the combatant into a berserk state.