Rerasu was a massive plant demon summoned by the Demon Lord Dante along with Devilman and Daruni. Dante make them fight to the death over the passage into the human world, Devilman knocked Rerasu to the ground, believing Rerasu to be unconscious he attacked Daruni, Rerasu however grabbed a large icicle and attacked from behind, but Devilman just used the Wing of Devil and knocked him back again, this time he falls on the icicle and spears himself through the eye with it.