She is the consort of Oroku Saki, the Shredder but is also the sister of the late Tang Shen. Oroku Saki lied to the Mistress and convinced her that Hamato Yoshi was the villain in the love triangle and not him. As a result Amaya became his loyal servant and at one point a female Shredder.
- Teenage Mutant Ninja Turtles Issue 24 (Image) reveals her to be not just Lady Shredder (originally meant to be Karai) but also the minor villain Headhunter.
- The 2012 version of Karai has many similarities with the Mistress. Both are biologically related to Tang Shen and were manipulated by Oroku Saki into being loyal to him against Hamato Yoshi.