Capybara is Kyoutarou Suga's pet. It appears in the Yuuki mini-series and develops the ability to fly and talk after continually eating space tacos. Capy is Yuuki's main early source of transportation and is the one who informs her of the Land of Tacos plight. It has a fondness for hot springs and it resembles a sunfish when swimming. Later in the series, Yuuki left Capy at the hot springs to continue her journey.
Capybara appears in episode 25 of the Saki (anime). He is also present as Kyoutarou's cell phone wallpaper.