Wiseman

Wiseman is the main antagonist of the first arc of Pretty Soldier Sailor Stellar.

Appearance
Wiseman appears as a hooded figure in a purple-black cloak. His hands are visible, and they appear to be dark multicolored. When his face was revealed, his head was a skull.

Pretty Soldier Sailor Moon (original timeline)
In the manga series, Wiseman was at one point a human being who lived in Crystal Tokyo and possessed dark powers which he used to unleash chaos to the populace and brainwash people to rebel against Neo-Queen Serenity. He was banished to the barren 10th planet named Nemesis because she couldn't kill him as he was still a human being. From there, Wiseman merged his spirit with the planet and became one with Nemesis. He cloaked his decayed and crumbling human body, and secretly went to Earth in order to look for discontent. He convinced residents that the 30th century utopia of Crystal Tokyo was an abomination against nature, as all of its citizens were given immortality through the power of the Silver Crystal. Thus the Black Moon Clan was born. Calling himself the Wiseman, he led them in an attack on Crystal Tokyo, and then into Sailor Moon's past to obtain the Silver Crystal and have his revenge.

As it was shown, he cares little of his pawns and even kills Rubeus in the manga. When faced with a new conduit for power, in the form of Chibiusa, Wiseman makes her his Black Lady. When Demande comes to his senses and blasts the Wiseman, the decayed body shatters, but Black Lady only laughs and reveals that Wiseman is Nemesis. With all of his followers gone, and Black Lady reverted to Sailor Chibi Moon, he creates a dark energy swirl to kill the Sailor Senshi. Sailor Moon and Sailor Chibi Moon attack the planet with a Double Moon Princess Halation and he is destroyed.

Pretty Soldier Sailor Stellar
In the fanseries, Wiseman plays the same role as he did in the manga, except in this version he isn't the planet Nemesis.