Demushu

Demushu (デェムシュ Dēmushu) was one of the last survivors of the Femushinmu civilization, having been transformed into a red Over Lord Inves before slaughtering countless weaker members of his kind when his world was touched by the Helheim Forest.

When the cracks opened the way to Helheim's next target, Earth, Demushu seeked to crush the weak of the humancivilization, gaining a rival in Kaito Kumon (Armored Rider Baron). However, he ultimately fell to the power of Gaim's Kiwami Arms.