One MBTI Personality Type
Personality
What personality type is One? One is an ISTJ personality type in MBTI, 1w2 - so/sp - 126 in Enneagram, in Big 5, in Socionics.
Now that Book 4 is out we see that One had his own personality before he was split into One-One. While there isn't a lot of screen time to go on, there were two instances (correct me if I'm forgetting another) in which we saw this original personality emerge during Book 1. The most notable of these was in The Unfinished Car, when the two personalities began to speak in unison as he was trying to "fix" the turtle car that Amelia created. This scene is what I argue to be most indicative of One's enneagram type: "I'm helping, Miss Tulip. I'm putting it where it's supposed to be. If they knew it was broken they would have fixed it. They don't need to worry anymore, I'm here to get things back in order." <--- Motivated by a desire for order and needing to fix a broken system (Enneagram 1) which he believes is in the best interest of the passengers (2 wing) "I have to help put things in order. It wouldn't be like this if I had just been better. [...] How can I not try and fix it? It's my fault." <---- Disintegrating into 4 under stress when falling short of the high standards that he's set for himself. Cognitive function type is more difficult to glean especially because of the uncertainty of his origin, but IxTJ seems most likely. Probably ISTJ, but INTJ isn't outside the realm of possibility. A lot of the characters on the show primarily operate under Si/Ne and Te/Fi and since those functions make up the two personalities he split into it would make sense for his original personality to also have them. Update: Sad One might be INTJ actually
Biography
One is/was the conductor of the Infinity Train, a singular robotic entity that acted as overseer. During the process of losing his position as conductor, One's psyche split into two personalities and became known as One-One.
Related Personalities
Tulip Olsen
Ryan Akagi
Lake
Jesse Cosay
Simon Laurent
Grace Monroe
Min-Gi Park
Amelia Hughes “The Conductor”
