Haru Tennōji

One of the protagonists, commonly known as Haru.

He is a man with long hair, a "flashy" appearance, and a reckless attitude with no brakes on doing "bad things." Often lets out a laugh that sounds like "Kuhaha."

Claims to be the "World's Most Selfish" and acts recklessly to achieve his ambitious goal of earning a "trillion dollars."

Possesses genius-level communication skills, physical strength, and intelligence, making negotiations, fights, and tactics seem easy; however, he's also known for his meticulousness and determination, choosing any means necessary to win. For instance, he effectively handled unexpected French and Chinese during his interview at Dragon Bank, showcasing his language proficiency. He considers his communication skills as "investment," stating that "getting along involves the risk of being hurt," and "it's natural to be afraid of other people," acknowledging that "one can't win them all," especially against someone like Kazuma Kokuryū with whom he can never get along.

Lacks technical knowledge but highly values Gaku’s technical skills, showing loyalty by handling public relations, sales, business decisions, and supporting Gaku in the company they co-founded, "Trillion Game."

Once secured a position at Dragon Bank but rejected it during the acceptance ceremony, choosing to start a business with Gaku because Gaku, a genuine engineer, was not hired. Not much about Haru’s personal life is revealed in the story, and he doesn’t appear in Gaku's life after becoming a millionaire.