The Brotherhood live on the planet Moord[2] in the Lomora[3] star system, in the Milky Way, while the Sisterhood reside on the Badoon homeworld of Lotiara[2] (Capella II, also known as "Swampworld"[4]), 42.2 light years from Earth.

The Badoon first appeared in Silver Surfer #2 (October 1968) and were created by Stan Lee and John Buscema.

[7] They have been known to form alliances with the Brood (against the Shi'ar and Earth's superhumans[8]), the Kree (against the Skrulls[9]), and Byrrah of Atlantis.

[15] The Inhumans and the Kree later form an alliance with the Badoon alongside the Centaurians, the Dire Wraiths, and the Kymellians.

The Badoons' procedure had them going through Amphogenesis upon injecting one drop of the diluted water from the dormant Amphogen (a mutagenic substance).

[18] The Badoon will bolster their forces with Zom soldiers: the corpses of victims turned into cyborg warriors.

In the Earth-93112 timeline, the Badoon Ecclaw was one of the last survivors of the Intergalactic Alliance destroyed by the Magus, who is best known as the mentor of the superhero Maxam.

It is a genetic parasitic experiment that was previously abandoned on the Moon and caused weather phenomena on Earth before being stopped by the Hulk.