Hecatia Lapislazuli is the goddess of Hell. She has an unwavering desire for personal freedom and dislikes authoritarians of any sort (somewhat matching her "unconventional" appearance). In particular, she has a strong distaste for the Lunarians, considering them to be the antithesis to her ideology. She joined forces with Junko to bring an end to their hegemony in the Lunar Capital. Her trump card, if Clownpiece and Junko had failed in their invasion of the Lunar Capital, was to trap the Lunarians in the Dream World and hold them hostage, hoping that it would provoke an attack of some kind, which she could use to her advantage. She did not know that the Lunarians had threatened to wipe out all life on Earth, including Gensokyo, forcing the protagonist to begrudgingly fight for the Lunarians in "Legacy of Lunatic Kingdom". (Source: Touhou Wiki)