The Ogdru Hem are the monstrous 369 children of the demonic Ogdru Jahad. The Ogdru Hem are essentially weaker versions of their parents, even so, they wield unimaginable power. All of the Ogdru Hem were imprisoned by the Watchers, but many are now re-emerging, with the aid of Grigori Rasputin and other agents of the Ogdru Jahad.
Many of the Ogdru Hem are without bodies and exist, invisibly, in the air. These evil spirits are used to help raise the Ogdru Hem that have bodies (such as Katha-Hem) out of their earthly prisons.
The physical form of at least one Ogdru Hem (Sadu-Hem) has, under study, been revealed to be a kind of fungus. This body was created out of blood at some point in the distant past, leaving it unclear if the same holds true for the original bodies created by the Ogdru Jahad.
All of the Ogdru Hem can mutate living creatures with their breath, with the most common example being Frogs. It is possible that this is the result of spores.
In ancient times some of the Ogdru Hem took the forms of dragons inspiring many myths on Earth.
The Visitor dealt with most manifestations, but a few evaded him. Rasputin awakened Sadu-Hem, but it was destroyed by Liz Sherman. Later Herman Von Klempt revived the Conquerer Worm, which was destroyed by Roger, Hellboy, and Lobster Johnson. Hellboy later fought and killed a revived Urgo-Hem. After Sadu-Hem began to regenerate, he was captured and allowed to grow by BPRD researchers before being freed by cultists and allowed to create a large number of frog monsters. These would later summon large numbers of Ogdru Hem spirits, but it is doubtful many of them regained physical form.
Landis Pope later fulfilled the frog prophecy of the Black Flame and awakened Katha-Hem, who was said to be able to make the world begin to change. It is possible that this caused a rise in Ogdru Hem appearances, though other factors such as the presence of the Right Hand of Doom on Earth and the crack Rasputin and Sadu-Hem put in the Ogdru Jahad's prison may have played a role. Although Liz Sherman defeated Katha-Hem, Landis Pope survived and began reviving Ogdru Hem instead of awakening them, with help from the King of Fear and his machines. Although all of these were destroyed by LIz Sherman, the Salton Sea Monster crawled out of the ocean soon after, marking the beginning of Hell on Earth.
The Known Ogdru Hem
- The Conqueror Worm
- Mister Tod's creature
- Salton Sea Monster
- Vucub Caquix
There have been several creatures that have been connected to the Ogdru Jahad, but have not been said to be Ogdru Hem.
- Sammael the Desolate One: A Hellhound from the Hellboy movie is a presumed member of the 369. While Sammael has more in common, physically, with the frog monsters than with a full-blown Ogdru Hem, he is described by Abe Sapien as the "Son of Nergal", who is one of the seven Ogdru Jahad. One of Sammael's numerous titles, the "Seed of Destruction", is a homage to the comic storyline of the same name, which first introduced the Ogdru Jahad.
- Behemoth: The hydroid-like Behemoth from Hellboy was also possibly an Ogdru Hem, serving as Rasputin's god. Once Rasputin was killed, the Behemoth erupted out from his body, much like Urgo Hem was released through the priest's blood in Hellboy: The Island, and grew to gigantic size. The Behemoth was very similar in size, appearance, and temperament to Sadu-Hem. Hellboy killed it with a belt of grenades through the throat.
- Thunder and Lightning: Two evil Japanese storm demons sealed within the Sword of Storms were featured in Hellboy: Sword of Storms. They can not be considered Ogdru Hem, but rather as brothers to the Ogdru Jahad, whom were referred to as "the Dragons".
- This creature is stated to be the same species as the Conqueror Worm in Conqueror Worm #2