Makino Suguru

The corporate director of Okoshi Pharmaceutical. He is Ai's father, making him both Kenji Osawa's boss and father-in-law. His ruthless and greedy behavior has him control Osawa's actions as he aims to quickly profit from their antiviral research.

Spoiler

He engaged in illegal human testing with the antiviral in South Africa to advance the drug's development as quickly as possible. Despite his cold demeanor, he is a frequent customer at a local cat cafe.