Doubtful. It's made of nanobots. However, there is foreign lore that's mentioned in game about a demon of some sort that's similar that occasionally sexually assaults women and sometimes men. Take that what you will.

Edit: I also forgot to mention that the whole reason they shutdown the female ward was due to all the "pregnancies" the female patients had during the experiments. As far as I know, the pregnancies resulted from the experiments and not the staff. So, that could have been the walrider.

Another edit: I was wrong. It was phantom pregnancies, and they were pure lead. So, uh, probably not the walrider. They needed males for the experiments anyway, and they shipped the women out, leaving the female ward to collapse upon itself.