She's a side character. I always make side characters that turn out to be very good looking XD, I can't add them to the main LIs every time that happens or we'll end up with 100+ LIs.
Oh and Zilphie wasn't created by me, she was given to me by a friend on discord and I just edited her looks a bit, I usually do cameos like this when people share characters they create with me on discord :)