Ryuji Yamazaki (山崎やまざき 竜二りゅうじ) is a character from the Fatal Fury series. He was introduced in Fatal Fury 3: Road to the Final Victory as a sub-boss and secondary antagonist alongside Geese Howard, and is also a reoccurring character in The King of Fighters series. His nickname in KOF XV is Wicked Heretic (邪悪な異端者).