Ripley is one of Wynter's three dwarf goats. Her mother is Wilma and her twin sister is Hypatia. The goats arrive in July 2014, four months after the family moves to Tiger Mountain (at the end of 04 Lost Melodies) when the twins are four weeks old and not yet weaned.
Jesse wants to call the twins Einstein and Newton, or Somerville and Germain. In the end, he and Wynter come up with one name each, independently. Wynter names her goat Ripley, after the main character in the Alien movies.
The goats live in a pen behind the house, and graze freely during the day within the large field closest to the house.