My original thought is ISFJ. He strikes me as traditional in his ideals and conservative in manners. What kind of a Perceiver, Ne-aux sticks with one vision of the future. Also, what kind of an INFP would remember everything in excrucating detail? I don't even remember what I had for lunch yesterday. My Si is god-awful. It could be just the show idea and has nothing to do with this character but ... it's something to take into consideration. He's hard to type. He could be INFP, but to me, he's more likely ISFJ. ISFJs can be very dreamy, very perfectionist, enjoys poetry and fancy-classy hobbies/interests. They want stability, someone to love, and take their commitments very seriously. I see INFPs as more flimsy, more dreamy, more out-there, more uncertain about the future and what they want. Our Fi-Ne constantly takes in information and is thrilled by possibilities. Ted is rigid in planning out what he wants. My close friend is ISFJ and we are similar in some ways. It's hard to say who Ted is fundamentally.