I'm sure everyone has a dark side so has issa
Issa as a human has 2 dark forms the absolute Dark form and the hyper dark form

I first start of with the absolute dark form and under it the rage mode of it

When issa is in her dark form (or murderer form called) her hair color turns to black and her eyes turn red

Next I'll post the hyper dark form

(Don't worry I'll do that in animatronic form too (>^ω^<))