Ralphie

 is a stenopelhabilis, and was temporarily the last living member of that race.

It was the offspring of the last pair of stenopelhabilis who died in the Tokyo Sanctuary super abnormal attack and were thereafter brought to the Old City Sanctuary. When Kate Freelander opened the cryochamber that the pregnant female steno was being held in in order to steal her tusks, the baby burst from it's dead mother's womb, escaping into the room.

As a small youngling, it roamed the Sanctuary and fed on everything it found, preferably hamburgers, although they were not considered healthy for it. Eventually, it found its way out of the facility and fled through the streets of Old City.

Henry Foss and Kate went out to find it and hunted into its nest in the sewers. It was there that they realized the creature had accepted Kate, the first being it met in its life, as its mother. Relieved, they returned it to the Sanctuary, where Kate named it "Ralphie", even though they did not know its gender with certainty.

Ralphie was later part of a very successful breeding program. One of Ralphie's offspring accidentally got loose in an IKEA warehouse in Old City.