Goat Orphnoch is a recurring Orphnoch in Kamen Rider 555, one of the monster-like beings that serve as the series’ main antagonistic force. Like other Orphnochs, it represents a human who has evolved or transformed into a powerful creature. Goat Orphnoch is typically depicted as a hostile enemy encountered by the heroes, contributing to the series’ themes of identity, humanity, and coexistence between humans and Orphnochs.