Good points about the Dream Lord; at least your not trying to convince me that he’s an INTP. I’m not quite ready to call him an ISTJ, but I won’t say it’s outside the “realm” of possibility. I’ll accept the ITJ compromise. It’s definitely ironic that a Saturn figure like that rules the Dream Realm.
You do well in presenting the type mathematics for your case about Death being ENFJ. But her ability to connect and empathize with people one on one seems IF to me, and the way she augments that with “new spin” could be EN as well. She seems more P to me than J overall; there’s really not an uptight bone in her body, such as it is, and she has that fluidity of a P, the way she just flows. She actually reminds me of ENFPs I’ve known as you say she reminds you of ENFJs. Fascinating, as Spock would say.
The difference between EN and IN by the way, would be a good thread topic. According to Lenore Thompson (from her book “Personality Type an Owner’s Manuel”) PET scan research has located what I call the Twilight Zone of IN in the left hemisphere of the brain and EN in the right. Essentially, according to this theory, all P functions (IF, ES, IT, EN) are in the right cerebral hemisphere and all J functions (IN, IS, ET, EF) are in the left. I used to think that SJs were left brain, NPs and SPs right brain and NJs a mix of the two, but this reasearch suggests that NJs are also left brain. “Split brain” people would instead be those who are very close on J and P. So if Death is a J, she’s left brain (according this theory), and if a P, she’s more right brain (not that she has a physical brain, exactly, but she must have some kind of mystical DNA that determines her type; we’d have to consult Gaiman’s muse to be certain). She strikes me as being more right brain, but definitely not the flaky type, and yes, very sensible, but that doesn’t rule out the ENFP set of functions, does it? And if Dream is an ISTJ, then Death being an ENFP makes her his precise opposite, which seems to fit.