TV-Series
Description
Dr. Chaos is a recurring antagonist in the supernatural comedy series Ghost Sweeper Mikami. He is characterized as an evil immortal scientist and a skilled alchemist, which establishes him as a unique threat who relies on scientific and alchemical methods rather than purely spiritual or magical arts.

In terms of personality, Dr. Chaos is portrayed as a highly driven individual, but his motivations are frequently undercut by a deep-seated obsession. His primary goal is to confront and defeat the protagonist, Reiko Mikami, driven initially by a desire to absorb her powerful spiritual energy. This plan involves using his alchemical expertise to exchange his own aging body for a younger, more powerful vessel. However, following a humiliating and painful defeat at Mikami's hands, his objectives shift. While the desire for power may linger, his actions become more centered on a personal vendetta, seeking revenge against her for the embarrassment and injury she caused him.

His role in the story is that of a comedic yet persistent villain. He schemes to capture or incapacitate Mikami and her team, often employing his advanced technology and alchemy. In one notable early scheme, he travels to Japan specifically to find a suitable target for his body-swapping experiment, settling on Mikami after learning of her power from the naive medium Meiko Rokudo. His plan involves swapping bodies with Mikami's lecherous assistant, Tadao Yokoshima, to get close to her, and capturing the friendly ghost Okinu in a bottle. This plot, like many of his attempts, fails spectacularly due to his own miscalculations and Mikami's strength, cementing his status as an ineffectual but determined adversary.

A key relationship is the one he shares with his loyal companion, Maria. Maria is a beautiful android servant who assists him in his schemes, acting as his enforcer and aide. She is often seen carrying out his orders, such as chasing down Yokoshima or destroying a telephone to prevent an alarm from being raised. Despite his villainous nature, his relationship with Maria appears to be one of master and loyal creation, providing him with a reliable, if not always successful, partner in his plots.

Throughout his appearances, Dr. Chaos shows little in the way of personal development, remaining fixated on his rivalry with Mikami. His primary notable abilities stem from his expertise as an alchemist and scientist. He has created a group of ghost-hunting androids, with Maria being the most prominent among them. His most distinctive demonstrated skill is the ability to create a device that allows him to swap bodies with another person, a power he uses in an attempt to infiltrate Mikami's agency. He also possesses tools like a small bottle used to capture incorporeal spirits such as Okinu. These abilities mark him as one of the few characters in the series who combats the supernatural with science and invention rather than traditional exorcism techniques.