Debo Tangosekku (デーボ・タンゴセック Dēbo Tangosekku) is a Debo Monster themed after Children's Day and armed with the Kenka Ryōseiba (喧嘩両成刃 Kenka Ryōseiba "Fighting Both Sides-Blaming Blade"), created to serve Dogold by emitting the white Koi Fog (鯉霧 Koi Kiri) from his Koinobori End-Space (鯉のぼり端句 Koinobori Tanku) to kidnap young boys to his hidden village to make them violent to the point of being beserk.