Included below is a non-comprehensive list of the ultimate fates of the various NPCs of SRWUG. More importantly: Reply to this post in the comments to detail what happens to your characters after the RP, starting from now and going on for as long as you want to go.
Bright Noa went on to serve in a long, successful military career as a commander in the UESSF.
Rozalin and Adell returned to their Netherworld to have an adventure of their own, gaining so many levels, you have no idea. All of the levels.
Overlord Mao went on to star in his own game, in which he was revealed to have a whole lot of deep-seated emotional issues.
Laharl, Etna and Flonne primarily starred in downloadable content, harassing the main characters of other games for unclear reasons.
Captain Testarossa eventually left MITHRIL and became a theoretical physicist.
GGG stopped producing weapons, and instead turned their research towards efficient, renewable, environmentally-friendly energy sources for the future.
Salgbar the Destroyer suffered many centuries of prejudice for his species and size, before hitting it big in the year Q0X6 with his debut operatic role as Fafner in Der Ring des Nibelungen.
The Nazis didn't win. Yet.
Leon Mishima was found guilty of treason, and was never heard from again.
The TSAB continued vigilantly protecting the multiverse from megalomaniac assholes everywhere.
Misato Katsuragi opened a popular bar in downtown Tokyo.
Wodan Ymir wandered the galaxy for many years, his final fate remaining unknown.
Shu Shirakawa disappeared mysteriously after the final battle. His whereabouts are unknown.
Yazan Gable, after sacrificing Dunkel to save his ass, fled the final battle of the Titans Conflict along with his remaining wingmate, leaving him alone with Ramsus. Mysteriously, he was never seen again.
Ramsus Hasa disappeared for a long time, but was eventually found five years later at a buddhist monastery, where he claimed to be working to atone for something that happened in the past.
Santa Claus continued to give presents to all the good girls and boys every year, as he always has.