Earth

Earth (地球, Chikyū) is the normal homeworld of the humans (人間, Ningen) or earthlings (地球人, Chikyūjin), as well as the other living creatures. This is also the main setting of the Hundred series.

Description
In the past, Maria Florence, a notre damian from the planet known as Notre Dame arrived on Earth, in search of a new homeworld for their species to inhabit. In space, she was assaulted by a savage and forced to cryostasis and awoke on Earth a million years later, then send a signal to her planet, while surviving on Earth in the undeveloped era. After Maria witnessed a little boy being attacked by a wolf, she later discovered that after being injured by the savage, she discovered a mysterious power, as well as being able to turn her amulet into a weapon.

After meeting the child's group, Maria had started to assist them in learning about building fire and various tools to help them in survival, which caused her to be worshipped as a god to them. Maria continues to assist the humans in their evolution using what she learned on Notre Dame til the current era where she undertook the name Serivia Notredame and becoming known as a God.

The First Attack
Years later, the savages began to land riding on meteorites bringing an illness that would soon affect the human race and later started to attack with the event becoming known as the First Attack. However, it is later discovered that inside of the meteorite a new kind of materials known as Variable Stone, as well as those who were infected with the virus letting him wield a newfound power and even cause the variable stones to react and transform, which soon led to the development of the anti-Savages weapons, the Hundred.

Trivia

 * The coordinate number for planet Earth is 0832•31342•134141.
 * It's possible that Serivia woke up during or after the Paleolithic Era.