While looking over some notes, I noticed an intresting feature of personality in the 2015 series.
It's most likely smart to start with some background into my notes. A few months ago I looked at their traits as can be caused by birth order. Basicly, I had a few lists of traits typicaly found in those who are the oldest, middle, or youngest child, respectfully.
What I found is as follows: Alvin and Theodoore both have the same single of four traits on the oldest, Alvin all traits for middle, Theodoore one of five for middle, Alvin one of five for youngest, and Theodoore four of five for youngest. I feel it is safe to asume that because Alvin is ENFP, he is Theodoore's twin, but over time built up the most middle traits. One thing to note is that Simon has all four oldest traits but no others. I feel this would mean he was born earlier. That is another topic, though.