Tenjuro Banno

Tenjuro Banno (蛮野 天十郎|Banno Tenjūrō) is the true main antagonist of Kamen Rider Drive and the creator of the Roidmudes, unique androids that were capable of "evolving" to become more like humans.. He was a scientist who was Go and Kiriko Shijima's birth father and a friend of Krim Steinbelt. Later, he creates a knockoff of the Drive Driver, dubbed the Banno Driver (バンノドライバー|Banno Doraibā) and transforms into Kamen Rider Gold Drive (仮面ライダーゴルドドライブ|Kamen Raidā Gorudo Doraibu).

History
When his development of the Roidmudes had hit a wall, Banno asked his friend Krim Steinbelt for help. Steinbelt gave them the prototype Core Driviars to continue their evolution. However, Banno began planning experiments which become more lethal. When a businessman refused to invest in Banno's research, he forced 002 to copy the businessman's appearance tortured 002 as if he was the actual investor. Krim later saves 002 and blamed him for such a malicious act, which led to the end their friendship and partnership. Soon after, Banno began to implant an evil chip in the Roidmudes containing negative emotions. He also secretly stole Krim's mind uploading technology.

Banno's body was killed by Roidmudes 001, 002 and 003, but his mind was uploaded into a tablet computer Brain stole from a bystander during 029's revival, which would later be used to help reset Roidmude Cores.

When Go found out the truth after Brain used Banno to shelter him from a blow from the Zenrin Shooter while he was down, the Kamen Rider went undercover to save his father, and pretended to be a betrayer. With help from Chase's interference, Banno was ripped from Brain's possession by Go and escaped with Banno.

While at first he seemed willing to help Go and his friends, it soon turned out that he was simply manipulating them for his own sinister ends. He gained control of one of the Ride Boosters and attacked the Riders when they tried to rescue Kiriko from being abducted by the Tornado Roidmude, causing a burned Shinnosuke to fall off a cliff and lose Mr. Belt to Roidmude 004. It also forced an overwhelmed Go to face Heart alone. Later, with the stolen data from Drive Driver, Banno successfully transfers his will into a new Driver he called the Banno Driver.