Evil Ryu, aka Satsui no Hado ni Mezameta Ryū ("Ryu who has Awakened to the Surge of Killing Intent", Satsui Ryu in short), or Dark Ryu in the UDON comics, is a playable character in various Street Fighter games beginning with Street Fighter Alpha 2. He was originally introduced in a Street Fighter Zero manga series authored by Masahiko Nakahira and later adapted in the Street Fighter canon by Capcom. He is the version of Ryu should he succumb to Satsui no Hado to his fullest extent, and depicts Ryu's struggle to resist the urge. Like Akuma, Evil Ryu has a signature symbol that appears when he performs the Shun Goku Satsu. Evil Ryu has a different symbol: in Alpha 3 and Capcom vs. SNK 2, his symbol was Metsu, for "Destruction" (滅), though it only appears in his ending, not during gameplay. He is a popular villain from the Street Fighter series. His Mortal Kombat rival is the zombie form of Liu Kang.
Evil Ryu often appears as a palette swap of Ryu wearing a black gi, although though the Alpha series also gives him a black head band. His skin also becomes a slightly darker shade along with his hair. From CVS and onward, he has been depicted with red pupils, although some games leave his eyes entirely red. In Super Street Fighter IV Arcade Edition, his design was given an update, taking on a much more feral appearance with traits taken from Akuma; his eyes now glow and his hair spikes up with red tint. Most notable of all is his chest which seems to have had a gaping hole punched in, with a similar scar on his back that bears a glowing ten kanji, as if resembling the Meido Gohado used by Oni and has become far more Powerful then his Alpha verison.