The Bestiary is an addon pack for all Season 2 models.
Please pick one of the models (female, male or barbarian), and pick any of the packs. When you are inside, push the Settings button, and the Bestiary should be the last pack icon.
After you click on it, and it’s highlighted, you will see the additional companions under the lowest main icon (General) and then the Companion category.
It’s easier to find when you are inside the program. 🙂