Dark Kingdom
Series creator Naoko Takeuchi originally intended "Sailor Moon" to last one season, but due to its popularity, Toei Animation asked her to keep drawing the manga series. Takeuchi stated she had difficulty developing a story for the second arc, and the whole idea of Sailor Moon's daughter coming from a future attacked by the Black Moon Clan came from her editor, Fumio Osano. To give Takeuchi enough time to develop the second arc, Toei introduced in the anime the Hell Tree aliens, thus the Black Moon Clan does not feature in the first thirteen episodes of "Sailor Moon R". In the DIC English adaptation of the anime, the Black Moon Clan is called "Negamoon Family". The term "Nega-" was also used for the "Negaverse" (the Dark Kingdom) in this adaptation, implying that the Black Moon Clan is related in some way to Queen Beryl and her cause, since the Dark Kingdom members use the term "Nega-" as a common prefix (e.g. "negapower", "negahistory" or "negamonsters").