I'm having a hard time finding where the "error" here is...

It's the eye. The artist has the wrong eye glowing.

The Feng Shui Engine implant is supposed to be in her left eye.

If you flip the image horizontally...

I know this is supposed to be a picture of her in the middle of a fight, but I can't help to imagine her running around the town with her tongue hanging out like that and screaming gibberish.

SinnerBeta said:
I know this is supposed to be a picture of her in the middle of a fight, but I can't help to imagine her running around the town with her tongue hanging out like that and screaming gibberish.

Well, she is described in a few places as a "depraved bisexual", as seen by her Ultra Combo.