Ma is a minor character who frequents the game center with a girlfriend. Both are prone to emotional outbursts, often throwing tantrums after losing versus matches. Ma's sprite image bears a strong visual resemblance to Haruo Yaguchi, a likeness that remains consistent even during in-game arguments or fights. She is 13 years old during the first part of the story and 14 during the second. Her girlfriend is another gamer known as Raging Girl.