Thanos personality type: INTJ

The scariest thing about Thanos is not the gauntlet. It is that he sounds calm, reasonable and sad while explaining why half of all life has to go. Villains who want money or revenge are easy to argue with. A villain who thinks he is the only adult in the universe is much harder.

That is a One with a Nine wing. Ones live by an inner standard of what is right, and they will pay any price to fix a broken world. That is the frightening part: Thanos does not see himself as cruel. He sees himself as responsible. He even destroys the stones after the snap so nobody can undo his work. The Nine wing is that eerie calm, the quiet retirement and the belief that peace waits on the other side of one more terrible act.

As an INTJ he holds one vision with an unshakable grip. Titan fell, he tells Strange, because nobody listened when he predicted it, and from then on every event in his life confirms the same idea. The idea becomes logistics: armies, adopted children trained as weapons, six stones, a step-by-step campaign across the galaxy. On Gamora’s home world he culls half the population at random and calls it fair, balancing a blade on one finger to show her the principle, because his system cares about numbers, not names.

The feeling is real, and that is what makes him horrible. He loves Gamora in his twisted way, and he throws her off the cliff on Vormir anyway, weeping. He cares little for comfort or pleasure. When the job is done, he retires to a farm, cooks his own food and watches the sun rise.

Lots of people type him ENTJ, a warlord at the head of an army. A fair point, since he commands and conquers. Still, he spends most of Infinity War doing the job himself, in person, following a private vision he has carried for decades.

There is no redemption arc here. The 2014 Thanos in Endgame, learning that his plan will be undone, decides to wipe out everything and build a grateful universe from scratch. A One with no self-doubt simply raises the stakes.