Houtua

The Futua tribe is a group of native humans present on Godzilla dominated Earth following humanity's escape from the monster. They are a collected group of descendant humans, from those left behind in the aforementioned escape.

A member of the group, Miana, is first seen in the 2017 film, Godzilla: Planet of the Monsters, and the group was spoken of in the synopsis of the film's 2018 sequel.

Culture
Not much is known of the Futua tribe's culture, however, they are very primitive in terms of clothing and weapon development. It's said that the tribe uses arrows, of which the arrowheads are made of nanometal, the same metal to makeup Mechagodzilla.

In the synopsis released for the sequel to Planet of the Monsters, it's said that the Futua tribe believes in a God, which Haruo Sakaki states was killed by Godzilla. With the knowledge that their weaponry is made up of nanometals, and Mechagodzilla was created with said metals, it's possible that Mechagodzilla is that God that's spoken of.

Godzilla: Planet of the Monsters
The Futua tribe was first alluded to in Godzilla: Planet of the Monsters, with Miana being seen in the film, stalking the newly arrived human forces on the planet. She would later be seen at the film's conclusion, in a makeshift hut, tending to Haruo Sakaki.

List of appearances

 * Godzilla: Planet of the Monsters
 * Godzilla anime (Chapter 2)