 The "Galaxy Fräulein Yuna" series was written and designed by Mika Akitaka, an artist known for his mecha girl designs in the "Gundam" media franchise.The first "Galaxy Fräulein Yuna" game was a pure visual novel, and while the second game added action elements like dungeon crawling and turn-based card battles, Akitaka had always wanted to develop a shoot 'em up.Hudson brought Akitaka on board to work with CAProduction to develop "Sapphire" as an original; it was unrelated to the story in his "Galaxy Fräulein Yuna" games.