Daishi Akita serves as the section chief of the organization officially known as the Super Population Research Laboratory, more commonly referred to as the Superhuman Bureau, which operates under the Ministry of Health and Welfare. In this leadership role, he is responsible for planning strategies and overseeing the bureau's various operations and field missions.

Very little is known about Daishi Akita's background, and even the staff members who work directly under him are unaware of his personal history or origins. He maintains extensive information networks and has many sources, most notably including Professor Magotake Hitoyoshi, who is the adoptive parent of Jiro Hitoyoshi, one of the bureau’s key agents. This access makes him extremely knowledgeable about the bloodlines, origins, and histories of various superhumans.

In terms of personality, Daishi is characterized by his remarkable composure. He remains calm even when facing the most dangerous situations, often maintaining a serene and peaceful smile on his face regardless of the circumstances. This unshakable demeanor contributes to his presence as a stabilizing figure within the bureau.

Daishi possesses a notable supernatural ability that allows him to possess other entities. He is capable of taking control of both human beings and non-human objects or beings, as demonstrated when he mentioned possessing an oil tanker during a particular incident. This possession ability has strategic applications that complement his role as a planner and overseer.

His primary motivation and first priority in his work is the protection of superhumans, who are often misunderstood, feared, or persecuted by the broader human society. This commitment to safeguarding superhuman rights and welfare drives his actions and decisions throughout the story, though his methods are not always transparent to those around him.

A significant revelation later in the narrative is that Daishi Akita is actually an alien. When this truth comes to light, he is exposed and seemingly lost, yet he survives by transforming into a gaseous state. In this form, he takes over the body of Mitsuya, a politician whose vote was considered essential for the passage of a new law that would have negatively impacted superhumans. Using this political figure's body, Daishi votes against the legislation, causing the bill to fail and thereby protecting superhuman interests from within the government itself.

This act reveals a deeper layer to his character development, showcasing a conflict of loyalties. While he is alien by origin, his mission to help and protect the superhumans of Earth takes precedence, even when it puts him at odds with his own kind. He reflects that he and his alien brethren might have been too arrogant in their previous approaches, suggesting a capacity for self-criticism and adaptation. His web of relationships is extensive, connecting him to key figures on both the human and superhuman sides of the conflict. He trusts Professor Hitoyoshi as an informant, while figures like Jiro answer to him, and politicians like Mitsuya become unknowing pawns or targets in his larger strategic game. Throughout the series, Daishi evolves from a mysterious bureau chief into a revealed alien who operates as a covert, independent agent working for the long-term welfare of superhumans, often in ways that defy easy categorization as either a hero or a villain.