Mamen, also known as Mamen Beans or simply Beans, serves as the personal secretary to the Hunter Association Chairman, Isaac Netero. His background is largely mysterious; his appearance is distinctly bean-like, with a bald head, no visible nose or ears, and a green or pink body depending on the anime adaptation. It is never confirmed whether he is human, some fans have speculated that he might be a Nen user who altered his appearance or even a creature from the Dark Continent, but the story offers no definitive answer. His personality is defined by professionalism, dedication, and quiet loyalty. He carries out his administrative duties with precision and enthusiasm, handling the logistics of the Hunter Exam and other Association affairs. His primary motivation appears to be serving Netero faithfully; after Netero’s death, he agrees to mislead the Zodiacs in order to carry out the former chairman’s final wishes, demonstrating deep loyalty. Mamen’s role in the story is that of a supporting bureaucratic figure. He is first seen distributing numbered badges to examinees before the Hunter Exam begins, and later gives a presentation to successful candidates about the benefits of a Hunter License. He reappears during the Chairman Election arc, where his deception of the Zodiacs highlights his continued allegiance to Netero’s plans. His key relationship is with Isaac Netero, whom he serves without question. He has little direct interaction with the main protagonists, though he does interact with the examinees in a neutral, procedural capacity. In terms of development, Mamen remains a consistent background presence; he does not undergo significant personal change, but his actions in the election arc reveal a deeper commitment to Netero’s legacy than his earlier routine duties suggested. He possesses no known combat abilities or Nen techniques; his notable ability is his organizational competence and his capacity to keep secrets on behalf of his superior.