Eridanus Equuleus Betelgeuse Reticulum Black (エリダヌス・エクーレウス・ベテルギウス・レティクルム・ブラック Eridanusu Ekūreusu Beterugiusu Retikurumu Burakku?) is a member of the Guild of Knowledge. Eridanus assisted Commander Donald and his Advanced Vangaurd Team during the threat of Destros. He gave them great amounts of information and he was also the member of the Guild to recruit King Anthony for his fame and status after Anthony returned to his normal self. Eridanus holds Anthony in high regard and warned him about the threat of Neo-GUILT the moment he found out. He also gives Anthony some moral support during Diavolo's War and tries to fight Diavolo himself due to the Dark being giving Anthony grief.


Eridanus is a constellation that is represented as a river. It's name is the Ancient Greek name of the Po River.

Equuelus is a constellation whose name is Latin for "little horse", or a foal.

Betelgeuse, also known as Alpha Orionis, is the second brightest star in the constellation Orion. It is a red supergiant and is among one of the most luminous stars.

Reticulum is a small, faint constellation whose name is Latin for "small net", referring to a reticle.


Eridanus's full name is a homage to the naming traditions of the House of Black from Harry Potter.