Mazinger Z vs. DevilmanEdit
The demons were originally sealed within the Himalayas until the female demon Sirene struck an alliance with Dr. Hell and used his Mechanical Beasts to free the rest of the demons. Dr. Hell then put the Demon Tribe under his control with microchips. Devilman saw the ordeal and allied himself with the Photon Power Laboratory and the Mazinger Z. Dr. Hell had the demons attack the lab, where Devilman is captured. When he is being tortured, the Mazinger Z comes to the rescue with the Jet Scrander, taking out the demons alongside Devilman.
Mazinger Z (Ōta)Edit
In a short story based on the original film several demons appear again assisting Dr. Hell in his nefarious schemes.
In a mini-arc partly based on Mazinger Z vs. Devilman, Dr. Hell once again uncovers the demons and takes control of them by implanting microchips into their brains. He has the demons attack Tokyo while some of the smaller demons kidnap young women including Miki Makimura. As the Angels fight the giant demons, they get some help from Devilman. However, two of their comrades are captured when they were investigating and end up getting trapped along with the rest of the women in Grogos G5. With Devilman restrained and the Angels in a pinch, they decided to ally with each other with Devilman causing a distraction that breaks Hell's control over the demons and the Angels defeat Grogos and rescue the hostages. The demons were later destroyed while some escaped until they were hunted down.
- The Demon Tribe never appears in the manga, while the demons were still the main foes of the books, Nagai thought that the Demon Tribe was to light heart sounding for his story that was far darker than the TV series.