Oroku Saki was effectively the same character as his Oroku Saki in the Mirage continuity. Since he was killed by Leonardo Hamato in the events before thePrologue of Mutant Ninja Turtles Gaiden, he makes no live appearances in the story. However, Saki has additional backstory unique to MNT Gaiden. According to Karai's account in Chapter 21:The Curse of "Yamata-no-Orochi", Oroku Saki's treachery against Foot Clan authority began even before he rebelled against Karai's authority.