A large, shiny black dog that appears in the ecological space behind a white arched door after the space upgrades. It can understand and communicate with Xie Zhizhi, responding to her questions with barks and nods. It is affectionate and playful, knocking Xie Zhizhi down with its paws like a hug. Xie Zhizhi refers to it as Big Black and considers it her companion in the space.
