Maledictus

What is known, so far, about Maledictus: Always female; their animal is dependent on the type of curse placed upon them. This curse is genetic, passed from mother to daughter. The mindset of the woman who is under this curse becomes that of the beast she has changed into once she is stuck. This is why Nagini wished to remain as a human. Upon getting stuck, she will no longer think as human but as a snake.

The animal they become can be identified by the mannerisms or small things the human does, seen with Nagini being a contortionist. They can become the animal at their choosing before winding up stuck as such. Do not mistake them as Animagus. They can't choose the animal they become