How was Magic Knight Rayearth created?
CLAMP were celebrating the publication of the Sōryūden novels, which they had illustrated, when Hideki Yamaguchi, an editor at the shōjo magazine Nakayoshi, asked them to make a series for him. The editor-in-chief wanted a story that could appeal to elementary-school readers and older fans at the same time; CLAMP, for their part, wanted to pull younger readers in.
Nobody handed them a formula, so they built one from their own appetites: robots, because they loved robot anime; role-playing games, then at their peak in Japan; and fantasy, to soften the robots for the magazine’s audience. Writer Nanase Ohkawa has said that Nakayoshi’s success with Sailor Moon is what made it possible to pitch robots to its editors at all.