Gazelle is an arrogant, almost sadistic individual from Dirty Pair Flash mission 3. Gazelle was enlisted by the 3WA to teach Kei and Yuri beach volleyball so that they could accomplish their latest mission; capture a corrupt president of a galactic company. In order to do this, Gazelle harshly drove Kei and Yuri to the point of total breakdown, and beyond that. He would do anything to whip the girls into shape, including outright lying; when Kei and Yuri chose to quit after his training reduced Yuri to tears, Gazelle told them on how fifty men had suffered at the hands of the president, including his best friend Andre. This gave the girls a renewed sense of duty, to which they resumed their training. On their last day, however, Kei and Yuri sent Gazelle to the hospital by knocking volleyballs primed to explode if touched by anything but their hands back at him.
After the tournament and subsequent arrest of the president, Kei and Yuri learned from Poporo that the fifty men Gazelle had mentioned hadn't died, but in fact suffered office-related injuries such as Carpel Tunnel Syndrome. They then went to Gazelle's hospital room in a fit of psychosis and proceeded to beat him up.