Two kids met each other, implied to be the reincarnations of Physis and Blue.
The Distant Finale shows some of the humans who left Terra for colonies far away deciding to pay a visit to abandoned Terra. The manga, isn't much better, Terra is destroyed by Gaia's Vengeance, Physis is last seen surrounded by escapees in what may or may not be their final moments, Tony is utterly broken by the trauma of everything, the other surviving Nazca children have become Energy Beings and simply take him to where he can't see Terra.However, most of the cast die to get there, and the children of Nazca leave Terra to avoid becoming humanity's new enemy. They did manage to make peace between the Humans and the Mu, destroy the SD system and generally make the world a better(?) place, and Jomy and Keith met each other after being reincarnated in the Distant Finale.Bishounen: Everybody but Zel, the old bald guy with the Vulcan ears.Beam-O-War: Jomy and Shiroe do this, as does the Mu ship Shangri-La with a satellite.Born Winner: Type Blue Mu, who are much more powerful than the regular Mu.Badass Longcoat: Keith, when he appears in public.And arguably everyone except the Nazca kids. The rampant character killing spree continues throughout the series only a few significant named characters make it all the way to the ending. Anyone Can Die: First example is Shiroe in episode 9.Ancient Conspiracy: The whole SD system qualifies.Against the Setting Sun: Episode 19, when the Mu learn the location of Terra.Adaptation Dye-Job: Let's just say there are a lot.
Adaptation Distillation: The anime managed to update the series for a modern audience while still remaining true to the spirit of the original.Ascended Extra: Suena was barely in the original manga, but gets a somewhat bigger role in the anime.Absent Aliens: Except in the manga epilogue.