Go-Buuro-Gu (ゴ･ブウロ･グ,Go Būro Gu)/Unidentified Life Form #37 (未確認生命体第３７号,Mikakunin Seimeitai Dai Sanjūnanagō): He can fly up to 300km/h, and armed with a bow gun that fires owl-feather darts, Būro assumes the form of a young man wearing sunglasses. When his turn came, he spent the five hours in Tokyo District 23 using his bow gun to snipe down people by the nines from the air, having all 126 victims die of a myocardial infection. Kuuga intercepts Būro at the Hygeia Building in Shinjuku, attempting to fight him in Pegasus Form as he temporary upgrades to Rising Pegasus Form. To evade his demise, Būro rips off his right wing when it was hit by Kuuga's attack and runs off to regenerate it. Once healed, Būro forces Kuuga out for a final battle, bringing out his Rising Pegasus Form. However, it took three hits from Kuuga to kill him.
His name is based on the Japanese word for "owl" (梟,Fukurō).