Ma-kun is a recurring minor character in the *Hi Score Girl* series, consistently depicted as an avid arcade gamer alongside his girlfriend, Raging Girl. Both display intense competitiveness, reacting to versus match losses with visible frustration, tantrums, and upset. He first appears at age 13 in Part 1 and ages to 14 in Part 2, characterized by brown hair and black eyes. A notable moment occurs when he loses a Street Fighter II match to protagonist Haruo Yaguchi, who played as Guile, triggering a significant outburst from Ma-kun. Visually, his sprite resembles Haruo, while Raging Girl parallels Akira Ōno, reinforcing their roles as secondary gamers within the arcade setting. Despite competitive clashes, they remain a couple. Ma-kun appears across both anime seasons, debuting in Season 1's first episode and continuing into Season 2 as a background figure. His presence consistently populates game centers and underscores the competitive gaming culture. Throughout the main series, OVAs, and sequel manga *Hi Score Girl DASH*, his role remains confined to episodic appearances illustrating arcade subculture and competitive dynamics, without significant development, backstory expansion, or involvement in major plotlines.