is a genius alchemist known as the "Puppeteer". At some point before the start of BlazBlue: Calamity Trigger
, he disappeared without a trace.
Relius is known and feared by Tsubaki Yayoi and Makoto Nanaya. He also seems to know and dislike Jubei of the Six Heroes. Carl, his son, hates him for taking Ada and his mother away. Carl spends a majority of his travels in pursuit of Relius. During Noel Vermillion's story in BlazBlue: Continuum Shift, Relius attempted to kidnap her in order to 'examine' her, and he seems to have gotten a hold of Arakune at the end of his respective story. He did not hesitate to attack his own son when confronted by him.
His experiments include the creation of Nox Nyctores
named Deus Machina: Nirvana
, which he harvested his daughter's body to create. He completed this project with help from Kokonoe
of Sector Seven
. His own puppet, the Fluctus Redacium: Ignis, was created from the body of his wife, Ignis, who is similar in appearance to Nirvana, although she has a red dress, blue, human-like eyes, a more slender head dress, a top hat instead of a bow, and hooked fingers.