Kai

Kai is the main antagonist of Kamen Rider: Electric King. He is a Singularity Point from the future who is the mastermind behind the Imagin attacks, psychically giving them the orders to destroy the key to the Junction Point to ensure the future of the Imagin.

Plot & Overview
To pick ideal dates to send Imagin back to, Kai uses a black page-a-day calendar where he has several hosts' memories & his own to pick from. To find these dates, he can look into human minds for strong memories much like the Imagin. When his own memories are used, a past incarnation of Kai appears in the past only to dissolve into a pile of sand. Kai is also capable of opening up portals through time & travel through it without the use of a time-traveling train, & through this ability can also release blasts of energy capable of erasing everything but himself from time & space. After mentioning how he feels about an event, he says "I have the face for it, don't I?" He often has an emotionless or angry expression on his face when he says this. Kai also has psychic abilities akin to Dwayne's, having the ability to control people as well as summon up a small troupe of break dancers. Despite his villainous methods, Kai believes that his goal of saving the Imagin's future is altruistic, having true feelings for their kind.

He originally believes that the key to the Junction Point is the elder Garrett Meggyesfalvi, traveling back in time to January 10 in the present year, to kill him. However, when the changes to the timeline from Meggyesfalvi's death are undone, he believes that Electric King is the culprit, & sends the Imagin Ryutaros to the ElectroLiner with a permanent ticket with the charge of killing Dwayne. When Ryutaros refuses to follow through with his mission, Kai reveals himself & tries to get Ryutaros to sabotage the MinoLiner, taking the ElectroLiner & Electro Belt out of commission. After this fails, he notices that Garrett does not protect his future self from harm in the past, but rather protects Dwayne.

After questioning him, Kai discovers that Amanda is the one being protected, & Kai sends an army of Imagin to kill her. As Amanda's memory loss & other quirks confound him, Kai creates the Death Imagin from all his remaining memories & will. Kai's army destroys the city until he finally discovers that the key to the Junction Point is not Meggyesfalvi or Amanda but rather their child, the Singularity Point Megan. After Electric King, Minos, & their Imagin partners protect Megan by destroying the Death Imagin, all of Kai's memories are used up & he dissolves away into sand, taking all of the Imagin except for the Tarōs, Deneb, Sieg, & a few other isolated cases with him.