Pretty sure the one in that image was the original owner of MC's current body (as we saw earlier it seems she possessed the body on the verge of death or after it died), after all she was talking about how she met the MC first.
I assume that she and her world were another project MC worked on (the one mentioned in this chapter where she was offered the project lead position) as the depicted character looks like what MC does currently and I highly doubt MC had blue slit pupils in her original body.