President Namba is a supporting character in the anime Girlish Number. He is the president of Number One Productions, the talent agency where the main character, voice actress Chitose Karasuma, is employed. In terms of appearance, he is an adult man with gray hair cut to neck length and brown eyes.

His personality is energetic and carefree, and he is described as having a strong sense of frivolity that shows both in his outward manner and in his inner character. He shares producer Kuzu-P's complete indifference to the quality of the anime his company is involved in producing. His interest in light novel adaptations seems to come less from any concern for the finished product than from a vague awareness that such projects were in fashion at the time. His motivations are therefore commercial and trend-driven rather than artistic. He makes his first appearance by proposing an idol voice actor project to Chitose, an initiative that helps set the main events of the story in motion. In his working life, he is a regular customer at a bar, where his habit of discussing business means his strategies can be observed by those around him.

As the head of the agency, Namba holds authority over Chitose and the other voice actresses who work under him, and his managerial attitude influences the working environment shown throughout the series. His closest counterpart among the production staff is Kuzu-P, with whom he shares a similarly careless approach to the quality of the work. His notable strength lies in his role as an executive: he is willing to take risks on new ventures, keeps an eye on market trends, and conducts his business with a relaxed, self-assured energy. He functions mainly as a representation of the business side of the entertainment industry, where commercial considerations routinely take priority over artistic ones, and he remains a fairly consistent presence over the course of the story rather than undergoing major personal change.