Movie
Description
Hiroshi Agasa, known as Professor Agasa, is a 53-year-old inventor and engineer living next door to Shinichi Kudo. He attended Teitan Elementary and Okuho Middle School, meeting his first love, Fusae Kinoshita, before she moved away during their sixth-grade fall term; his family subsequently relocated to the countryside. His family includes a deceased great-uncle, Kurisuke Agasa, who died 50 years prior at age 38, a great-aunt, Teiko Agasa, who passed away around age 76 about a year earlier, an unnamed cousin, and a cousin's granddaughter.

After Shinichi Kudo's transformation into Conan Edogawa, Agasa became his pivotal confidant and supporter. He was the first person Shinichi encountered post-shrinking by the APTX 4869 poison. Agasa immediately fabricated Conan's identity as the child of distant acquaintances, enrolling him at Teitan Elementary, which led to the Detective Boys forming. He designed numerous investigative gadgets for Conan, including the voice-changing bowtie, detective badges, and flashlight-watches, though some inventions proved unreliable or destructive. Later, he took in Shiho Miyano (Ai Haibara) after she collapsed near his home escaping the Black Organization, providing shelter and aiding her transition.

Haibara often assumes a protective, maternal role toward Agasa, monitoring his diet and intervening in danger. Agasa shares a longstanding friendship with Shinichi's parents, Yusaku and Yukiko Kudo, collaborating on schemes to protect Conan. He maintains a paternal bond with the Detective Boys, frequently organizing outings that inadvertently involve them in criminal cases. Decades after childhood, he reconnected with Fusae Campbell, with romantic feelings remaining implicit.

Agasa exhibits a jovial, outgoing personality and is well-regarded in his community, aiding his concealment of Conan and Haibara. He possesses notable luck winning food tickets and lotteries. Physically, he appears older than his age, slightly overweight, with partial baldness, silver hair, thick eyebrows, a mustache, and a bulbous nose. He typically wears round glasses and lab attire. He drives a yellow Volkswagen Beetle prone to mechanical failures.

In *The Fist of Blue Sapphire*, Agasa appears among the characters without documented involvement in the film's central events in Singapore, focusing on Conan and Kaitou Kid recovering the gemstone; his role is limited to background presence.