Liv Moore is a non-combat pet in Diablo III, added in patch 2.4.1. She drops from Ravi Lilywhite in the Weeping Hollow area.
This appears to be a small zombie. With a knife in her hand? She won't eat your brains, unless you're already dead. Then she'll know your secrets.
Trivia
- The pet's name, appearance and description are a likely reference to Olivia "Liv" Moore from the iZombie television series.