Well, thanks to a post made by Jezus Saurus Rex, I found something interesting. BTW i've already posted this on the post, but becuase its nobody replied to my theory, I thought making a new topic would make people see. Take a look at this:

https://codzombies.forumotion.net/dr-picture-analysis-f17/various-pictures-of-der-riese-from-pc-files-t1394.htm

That's the original post. Now, I can't figure out how to upload photo's. It would eb a LOT easier, but sadly I can't, so just do your best to follow what i'm saying (lol). Go on the original post and If you scroll down a bit, take a look at the images you see in the teleporter when you teleport (it's blue.) now, take a good look at the second image on the top row. A strange looking zombie. I thought it was female at first, but it probably isn't. Anyway, scroll up till you see the drawings on a yellowy paper. The one with a diagram of a hellhound and zombie. Well, the diagram of a zombie is based on the zombie seen on the top row. Some clothing and same appearance. Also, take a look at the 3rd image on the bottom row. Same character, but crawling? Never seen a zombie do that. The image looks female, but the drawing looks male. If its female, it could possibly be sophia or samantha (bit big for samantha though) Let me hear your opinions.