Michael (The Good Place)

Starting off as a guide for the people in The Good Place, Michael is revealed at the end of Season 1 to be the main antagonist of the show. Michael is introduced as an immortal being called an Architect, who constructs neighborhoods for humans habitation in the afterlife.

In reality, Michael is an Architect for the Bad Place and masterminded a Bad Place to fit four people, who would slowly torture each other over the course of a thousand years. The people selected for his project were Chidi Anagonye, Jason Mendoza, Eleanor Shellstrop, and Tahani Al-Jamil.

When Vicky takes control of the neighbourhood he teams up with his victims to defeat her. Close interactions with them made him like them more and made him a good person willing to sacrifice himself for them and do anything to help them reach the real Good Place.