ESO/M. Kornmesser

Proxima Centauri b is an exoplanet with a habitable atmosphere that revolves around the red dwarf star Proxima Centauri. It is assumed that "Proxima B" refers to a similar thing within the AppSir universe. In The Last Yandere, it is revealed that the world discovered Proxima B some time before November 2018. Proxima B, or perhaps its inhabitants, are likely seen as a threat, although the TriNemesis and DE**.EXE both use “alien tech” from Proxima B. Not much else is known about it.