Krim Steinbelt

Krim Steinbelt (クリム・スタインベルト) was a scientist who invented and installed his conscious within the Drive Driver (ドライブドライバー) after his "death" by the Roidmudes. He is affectionately nicknamed "Mr. Belt" (ベルトさん) by his user, Shinnosuke Tomari. Krim serves as the support unit for Shinnosuke when the latter becomes Drive and can assist him later after achieving Shift Tridoron.

History
"I can't die...I won't die yet! I can't leave these guys on the loose!"

- Moments before his death

Mr. Belt was once Krim Steinbelt, the man who created the Core Driviars for the Shift Cars and Tridoron. He assisted his friend Professor Banno in developing the Roidmudes after they hit a wall in development by giving them Core Driviars. However, they went out of control and began harming humanity instead of helping it. He resolved to stop them by using contingencies including the equipment used by Drive, but his home was attacked by the first three Roidmudes, with his body being killed by Heart. He was originally supposed to inhabit the body of Cyberoid ZZZ but abandoned it due to the need of a stronger will. Thus, he transferred his consciousness to the Drive Driver, and continued his fight by aiding Drive.

Mr. Belt received help from one of his old colleagues, Jun Honganji, whom set up the formation of Special Investigation Unit as well as the setting of Drive Pit. He even recruited Rinna to create most of Drive's arsenals and seeking his mentor Harley Hendrickson to built a new Rider System that would surpass him as a safety precaution.

Global Freeze & Shinnosuke's recruitment
"Protect the humans."

- Mr. Belt's instruction to Protodrive

He was present for the beginning of the Global Freeze and the rise and fall of Protodrive. He used the Roidmude Proto-Zero as his user, but found that he was incapable of destroying Cores. Following Proto-Zero's supposed death and despite being haunted by dreams of his past life, and the fear of Heart and 001 (who played a role the day Proto-Zero was supposedly killed) Mr. Belt continued to supervise the upgrades to the Drive system and scouted out a new candidate, finding one in forlorn, depressed super cop Shinnosuke Tomari. After revealing himself as the source of Tridoron's "Voice", Mr. Belt received his name and gained his new warrior in Shinnosuke. From then on, he would teach the young man all about the Roidmudes, the Shift Cars and what it meant to be the warrior Drive.

Later when Drive was about to face Heart for the first time, he demands the rider and Kiriko to retreat from the opponent as the belt reveals his past to Shinnosuke back in the Drive Pit. Taking Shinnosuke to his destroyed mansion and giving him more info about his past, Heart arrives to fight them. However, Mr. Belt still had fears of the Roidmude but Shinnosuke decides to fight the monster without hesitation. While fighting, the belt notices that Heart has become stronger from before as the latter would perform his deadliest attack: the Dead Zone. Heart performs the Dead Zone on Drive as the rider is willing to sacrifice himself. Drive would plan to get Mr. Belt away from the attack so he can find a new user, but the latter refuses. A moment later, Chase appears to save Heart as they believe that Drive is gone. Being saved by the Shift Cars, Shinnosuke was critically injured and Mr. Belt becomes irate about his actions. However due to Shinnosuke's actions from the battle, this reminded Mr. Belt why he built Tridoron.

When the Roidmude guardian Chase/Mashin Chaser appeared, Mr. Belt realized that his appearance and powers were themed after Protodrive, the first Drive. Ever since then, Krim doubted and was curious of what Chase had in relation with Protodrive. This wasn't until the Special Investigation Unit's Christmas Eve ceremony, Mr. Belt (through the Shift Cars) witnessed Chase's Roidmude form and number, 000 and he finally realized that his long dead comrade had mysteriously sided with the Roidmudes.

When Medic had placed the Tire Exchange Shift Cars under her control and an upgraded Mashin Chaser overpowered Drive, Krim remembered Shift Formula, a Shift Car he created a long time ago but forced to hide it's existence due to the risk it carried. Having no other options left, he was forced to release the Shift Car for Shinnosuke's safety, granting Shinnosuke Drive Type Formula. However, the form was later made to be safely used with the creation of Trailer-Hou by Rinna.

Followed by the revealing of Neo-Viral Cores that let Roidmdues fuse with humans through their darker hearts, Mr. Belt undergoes modifications by Rinna to only attack the Roidmudes' structures without harming the human inside with a sample of Mashin Chaser's blasted-off Violet Guard.

In the end, when Hayase's life is endangered by Hajime Taga/Sword Roidmude, Mr. Belt forcefully agrees to let Shinnosuke transform in front of several citizens including Kyu and Genpachiro. With all Special Investigation Unit members made aware of the Drive Pit, Jun revealed himself as an ally of Krim and had made Shinnosuke's identity as Kamen Rider Drive public.

With the emergence of Roidmude 001, Mr. Belt's fear escalated to the point of frequently dreaming of Protodrive's defeat back in the Global Freeze, fearing that he would lose Shinnosuke as well. Due to this, he always scolded Shinnosuke for acting on his own but after encouragements by Chase (whom returned to his aid) and his old colleague Jun, Mr. Belt ceased his fears and helped Drive defeated Freeze Roidmude. But as it seemed that they won, Freeze's Core intact and evolved into Super Evolution, killing both Shinnosuke and the Drive Driver.

Future
In the year 2035, Kamen Rider Drive system somewhat goes awry, leaving all of Drive's arsenals (including the Drive Driver) fallen into the hands of Kamen Rider Dark Drive, the new user of Drive.

Personality
"Mr. Belt" is an elegant individual, guiding Shinnosuke as he adapts and learns more about being Drive. He is very smart, having been the inventor of the Drive Driver, and his intelligence manifests in often adding English to his sentences. He often makes puns about driving like Kiriko, and though he is often cool, calm and collected, he becomes hot-blooded in battle. He'll have the tendency to say "Start Your Engines!" every time Shinnosuke is able to enter battle.

However, he is not without a dark side. Considering his past life as Krim Steinbelt, Mr. Belt is very driven to fight the Roidmudes. He often prefers to keep secrets from Shinnosuke and everyone he knows (Rinna as his third assistant, Go Shijima, Kiriko's little brother as the candidate for a new Rider System) despite having themselves as trustworthy allies, which angered them further. Even if that's the case, Krim eventually cares for his comrades, having tried to keep Shinnosuke out from any battles against Roidmude Executives as possible to prevent his loss.

Since Heart was the one whom killed him, Banno and Protodrive (who was later revealed to be alive), Mr. Belt developed a fear towards him and if Drive and Kiriko would come to face him, he would order them to retreat. Ever since he assisted Banno in the creation of the Roidmudes, he was guilt-driven for the rest of his life, having given a hand in creating the "monsters".

Portrayal
Krim Steinbelt, who is also the consciousness of the Drive Driver is portrayed by Chris Peppler.While possessing Shinnosuke, he is portrayed by Ryoma Takeuchi while retaining his voice.

Conception
The Drive Driver has been noted by producer Takahito Omori as Drive's version of, the automobile housing an artificial intelligence in the TV series , keeping with Drive's description as 'Kamen Rider meets Knight Rider'.