Eita Kobayashi (小林 瑛太, Kobayashi Eita, born October 27, 1991), known mononymously as Eita, is a Japanese professional wrestler currently signed to Dragon Gate, where he is best known as the former leader of the villainous Real Extreme Diffusion (R・E・D) stable, in which he led the stable for nearly its entire run. As part of his current persona as a narcissist, he is known as Numero Uno (number one in Spanish).