It's often the case that popular anime or manga franchises are adapted into games, but not as often do you see a game franchise turn into popular anime and manga. Sakura Taisen is one of the best examples of this phenomenon, and given the pedigree of its creators it was probably destined to become a media franchise from the beginning. The creator of the series was Ouji Hiroi, a manga creator who is probably best known for the creation of Sakura Taisen. The scenario writer was Satoru Akahori, a scriptwriter, manga author and novelist best known for such 90s staples as Saber Marionette and Bakuretsu Hunter (Sorcerer Hunters). The character design was done by Kousuke Fujishima (he's certainly best known as being the creator of Ah! My Goddess!, as well as his involvement as a character designer in the Tales series of games) and Hidenori Matsubara (he did the character design for Fujishima's original designs in the various Ah! My Goddess! anime adaptations, and has also been involved as a key animator in many other big animated features). Last but not least, the music was composed by Kouhei Tanaka (a composer of more game, anime and tokusatsu theme songs than I can count).