Thread:WarriorMan199456/@comment-32173693-20170710170134/@comment-32173693-20170710173813

Thats the point, the four have to survive and find a way to get off the planet (Named Terranox by Rias). Matthew and Rias have been living on this planet for years and still are stuck. It makes it impossible for any teleportation or flying abilities to work on Terranox and negates any supernatural abilities that could destroy the planet itself.

So in short, the planet is sentient to a degree.

It puts survival of the fittest to the next level, Ophis and Issei wouldn't be at the top of the food chain, as it goes, their at the bottom with Matthew and Rias.