Like humans, gorillas and kittens have unique personalities and relationships that evolve over time.
Koko’s kittens, Ms. Gray and Ms. Black, who appeared first in the video “Meet Koko’s New Kittens,” are growing into cats. Koko enjoys engaging with them as they grow, and as their personalities and relationships — with each other and with Koko — begin to change. In this video, Koko begins to have a closer relationship with Ms. Black, though her main interest initially was Ms. Gray.
(PS: If you missed the original video of Koko first meeting her new kittens, you can watch it here: https://youtu.be/gR6MeFFzqQ8 )