Beatrice's Ghost.

Beatrice's Ghost: The ghost of young Beatrice Horseman, she cradles a little horse doll in her arms which she refers to as 'her' baby and she appears to be crying and sobbing.  She is crying because she needs somebody to love and to care for her and all she wants is to be loved and to find someone who cares for her in a lot of ways.  In addition to this she is a The Frighteners style ghost and also can possess people to transform them into Bojack Horseman style anthro animals (equines and sea-creatures included) or into an existing character from the series,  she also may turn someone she possesses into a full bodied version of her when she was much older as well.