Zu-Gooma-Gu

Zu-Gooma-Gu (ズ･ゴオマ･グ, Zu Gōma Gu) is a vampire-bat Gurongi who is a member of the Zu Group. He is given the codenames "Unidentified Life Form #3" (未確認生命体第３号, Mikakunin Seimeitai Dai Sangō?) and "B2" (Ｂ群２号, Bīgun Nigō).

History
Among the first Gurongi to appear in Nagano, the photophobic Gooma commits vampirism on five humans in a single night until sunrise where he murders the preacher Father Jose and dons his attire to use the Church as a base of operations. He managed to overpower Kuuga until being driven away by the headlights of a police car. When Ichijo uncovered the truth, he battles Gooma as the church is set on fire and Yuusuke assumes Mighty Form for the first time. However, though he had the advantage with Gumun's aid, Gooma retreats when dawn occurs. Later donning a black trench coat and fedora to protect himself from direct sunlight, Gooma was temporary removed from the game as a result and becomes Ra-Baruba-De's underling when the Zu lose the right to play. His flying from Tokyo to the site of Gurongi burial grounds in Nagano, finding a discarded piece of Daguva's body item and having it refined before using it on himself to evolve to a state where he can now resist sunlight and assume a dark-skinned and brown long haired Strengthened Form (強化体, Kyōkatai). But the evolution increased Gooma blood-lust as he actually attacks Baruba to force Daguva's location out of her with the intent to kill Daguva and get all his power. But when Gadoru overwhelms him to cover Baruba's escape, Gooma is forced to retreat as the final stages of his evolution take effect, his hair grayed in the process with the ability to assume a white-haired and armored Ultimate Form (究極体, Kyūkyokutai). Going on a killing spree in Chiba, killing as many people as he could before Daguva comes for him. But Kuuga arrives to fight him in Titan Form as Ichijo uses a device specially made to disrupt Gooma's via sound waves. But Gooma manages to destroys the device and was about to kill Kuuga when Daguva finally arrives. He runs off to fight Daguva, only to be slaughtered by him with his corpse found by Yuusuke and Ichijo as it is taken for medical analysis, leading to the development of the Nerve-Breaking Bullets.