Souten no Ken Regenesis Episode 19, A Man Vanishes into Nothingness (散り逝く漢)

Official synopsis Genesis's palace begins to collapse under the effect of a self-destruct mechanism. A deafening crash echoes throughout the palace, as pillars and walls crumble. To protect Erika and Fei-He, Yasaka, buried under the debris that has fallen, is engulfed by the flames of the explosion. Meanwhile, in the research and development room deep within the underground palace, Simeon discovers the true face hidden beneath Himuka's mask. "Himuka... that name, you no longer need it." Himuka, whose heterochromatic eyes gleam with a piercing blue right eye and a golden left eye, had never stopped deceiving and using Simeon.