 The idea for Splash Woman, the first female Robot Master of the original series, was requested by the planning team.Hornet Man was originally conceived as another female Robot Master named "Honey Woman" before being changed to a male after Inafune presented his design of Splash Woman.The musical score and sound effects for "Mega Man 9" were composed by Ippo Yamada, Ryo Kawakami, Yu Shimoda, and Hiroki Isogai.