Noire Fallenstar

A villain from another universe of existance, persuing the legendary sword of calamity beneath. Appeared during the Project Kaleidoscope one shot series.
During the events of Star-sent, she appeared underneath Obraskyr Castle, claiming to be the leader of an organization called The Syndicate that is now operating in the Forgotten Realms. She took the Heavenly Sword of Gathering Clouds after cleaving through the ground between the Underground Mausoleum and the Wedding Chapel.
During the events of Swamp Busters, she appeared at the otherworldy underground city of Neo-Olympus as the High Queen. She challeneged the Swamp Busters crew, only to be pushed back into a corner and start an impromptu raid on Arabel. However, thanks to those same heroes, her plan was foiled without much casualties and was subsequently slain by them. Wigglsme stole her lifeless body and the Heavenly Cloud of Gathering Stars.
During the events of Planar Partyhouse, an Astral Elf called Sil Novaheart revealed that the Noire Fallenstar they've interacted with so far has been a fake puppettering the corpse of the real one who perished more than 1,500 years ago in their realm. The real Noire Fallenstar is very well regarded as a legendary figure who gave her in life to save her comrades in the war against the Fell God. The Fell God Tartarus is also the one who had been puppettering corpse until it was finally freed from his clutches.