Demushu is a red Over Lord Inves and one of the few survivors of the Femushinmu civilization. He serves a major antagonist in the "Helheim Invasion" saga of Kamen Rider Gaim.


Kamen Rider Gaim

After being transformed into an Overlord Inves, Demushu massacred the weaker of his own kind alongside the other Overlords.

Demushu summoned several Elementary Inves to attack Baron, who was looking for him, giving him the opportunity to escape. Demushu and Baron eventually encountered each other again and fought, with the Overlord Inves easily overpowering the Rider. However, only Kamen Rider Marika appears and distracts Demushu so he can escape

Demushu later attacks Gaim, but was stopped by Redyue so she can bind Kouta with the Helheim plants. Demushu later fights Kaito again, this time on much more equal footing. However, their battle is interrupted by both Gaim and Redyue, with the latter telling Demushu to retreat.

Demushu soon began looking for Kaito again, attacking several researchers along the way. He eventually comes into conflict with Zangetsu Shin and Gaim, however, Rosyuo orders him to retreat and telepathically tortures the red Overlord until he obeys.

Demushu later has a rematch with Gaim and Zangetsu but Sigurd soon appears and challenges him instead. Demushu soon notices that a crack had opened and enters through it into Zawame City, which he begins to destroy upon his arrival. Gaim and Baron try to defeat him but ultimately fail. However, Kouta transforms into Gaim Kachidoki Arms and gains the upper hand in the fight. However, Marika and several Kurokage Troopers attempt to capture Demushu, giving the red Overlord the chance to turn the tide of the battle. Kouta then flees with Kaito. 

Demushu then goes to a place with Helheim fruits and eats one, allowing him to assume an Evolved Form. Demushu easily defeats the Riders on Earth, with Duke leaving them. However, Kouta arrives and uses his Ultimate Form equipped with the Kiwami Arms to destroy Demushu.

Super Hero Taisen GP: Kamen Rider 3

Demushu was among the many villains in service to Shocker after their History Changing Machine rewrote the timeline. Though manages to kill Kamen Rider Mach he is by Gaim using his Orange Arms' Burai Kick. victims.

           Kamen Rider Villains

Foundation X
Neon Ulsland | Jun Kazu | Tabata | Doctor Prospect | Lem Kannagi

Sonozaki Family: Ryubee Sonozaki | Saeko Sonozaki | Wakana Sonozaki | Kirihiko Sudo | Mick

Ankh | Uva | Kazari | Gamel | Mezool | Ankh (Lost) | Kiyoto Maki | Shocker Greeed

Horoscopes: Sagittarius Zodiarts | Virgo Zodiarts | Libra Zodiarts | Scorpion Zodiarts | Leo Zodiarts | Cancer Zodiarts | Aries Zodiarts | Capricorn Zodiarts | Aquarius Zodiarts | Taurus Zodiarts | Gemini Zodiarts

Wiseman | Phoenix | Medusa | Gremlin

Yggdrasill Corporation
Takatora Kureshima | Ryoma Sengoku | Lock Dealer Sid | Yoko Minato | Mitsuzane Kureshima | Oren Pierre Alfonzo | Kurokage Troopers

Overlord Inves
Rosyuo | Redyue | Demushu | Dyudyuonshu

Helheim Forest

Executives: Freeze | Heart | Brain | Roidmude 004 | Roidmude 006 | Medic | Mashin Chaser | Gold Drive
Reaper Legion: Roidmude 013 | Roidmude 015 | Roidmude 019 | Roidmude 021 | Roidmude 022 | Roidmude 028 | Roidmude 032 | Roidmude 034 | Roidmude 035 | Roidmude 044 | Roidmude 045 | Roidmude 054 | Roidmude 059 | Roidmude 070 | Roidmude 075 | Roidmude 081 | Roidmude 092 | Roidmude 094 | Roidmude 100 | Roidmude 101 | Roidmude 104 | Roidmude 105
Other Roidmudes: Roidmude 016 | Roidmude 036 | Roidmude 057 | Roidmude 060 | Roidmude 062 | Roidmude 074 | Roidmude 076 | Roidmude 098