Movie
Description
Dr. Fritz von Gustav Karigari, a scientist of German and Japanese heritage, channels his formidable intellect into elaborate revenge schemes against those who wronged him. His disaster control engineering project, the Hyper Master Slave, was terminated after Jou Kurumada exposed critical safety flaws, leading to the rival Drive Head project's selection and fueling Karigari's enduring grudge against Kurumada and Mobile Rescue Police commander Takahito Saionji.

Possessing a towering ego, Karigari constantly proclaims his intellectual supremacy and demands recognition through self-bestowed, ever-changing titles. Despite this arrogance and a personality marked by pettiness, vengefulness, and a refusal to acknowledge positive motives, he demonstrates genuine scientific brilliance and an underlying heroic streak, actively avoiding civilian harm. He harbors a significant crush on television announcer Yuri Sasagawa, becoming visibly flustered in her presence, prioritizing her safety above all, addressing her respectfully as "Miss," and considering her his most trusted person. Physically, he sports poofy blonde hair, greyish-purple eyes, and typically wears a white shirt, red tie, tan vest, brown suit jacket, and matching pants. Following an attack by the Evil AI that destroyed his hideout, he sustained severe injuries requiring a silver mask over his left eye and a robotic replacement for his right hand.

His operations rely on two subordinates, Yusuke and Akira, whom he publicly derides as fools but privately values and protects. Returning to Japan seeking vengeance against the Mobile Rescue Police, his initial plots included trapping Chief Kanji Gozu in the explosive-rigged Akashic Tower (using fake explosives), attempting to incinerate headquarters with a solar-powered "Archimedes Beam," and hijacking weather tech to create city-wide disasters, all thwarted by the Drive Head team.

Confronting the sentient "Evil AI"—a program born from negative human emotions causing disasters—forced his evolution. After the AI destroyed his hideout and nearly killed him using his own Walker Vehicle, Shun Kuroeda of the Mobile Assault Police rescued him. Hospitalized, Karigari collaborated with the Mobile Rescue Police to develop a counter-virus against the AI. Though initially incomplete, this virus became crucial after refinement with help from Pit, the headquarters AI.

After recovering, Karigari escaped the hospital but continued supplying intelligence on the Evil AI to Kurumada, maintaining his vengeful facade. He later assisted in capturing Evil AI-controlled replica Drive Heads and participated in efforts to stop Terra, the AI's android form. Despite these contributions, he outwardly denied any alliance, insisting his sole goal remained revenge against Kurumada. His complex moral code manifests in warning civilians before attacks, refusing to cause genuine harm during a city-wide blackout bluff, and consistently prioritizing Sasagawa's well-being, even saving her life during a meteor incident. He is an Ophiuchus and prefers steak.