King of Fighters '97 is the 4th title in this seminal series, once again letting participants to battle oppositions with popular fictional characters from Fatal Fury, Psycho Soldier, Ikari Warriors, Art of Fighting and even more well known games. The fictional character roster alters with every iteration, and new characters in this 1997 title are ones like Chizuru Kagura - a boss - as well as wildly popular SNK characters Blue Mary, Ryuji Yamazaki and Billy Kane.