Kenta Hasegawa is a classmate of the main character, Maruko, in the third grade. His character is notable for being based on a real person of the same name, who was a classmate of the original manga author during their own elementary school years. This real-world counterpart went on to become a professional soccer player and later a manager for the Japanese national team.

Reflecting the interests of the person who inspired him, Kenta has a strong love for sports, with a particular emphasis on football. In the story, he is a recurring background character within the classroom setting, fulfilling the role of a sporty and energetic boy. Information regarding detailed personality traits, personal motivations, significant character development, specific relationships beyond being a classmate, or any unique notable abilities outside of his general athleticism is not available from the provided information.