Jeff- ESFP/ENFP I guess. So talkative.
Nergal - ENTJ (second favorite!)
Jr - INFP at first glance, but maybe ISFP. I don't remember enough to say
Jack!(my favorite) - so very ENTP
What about Erwin? or Scar? idk about Erwin, maybe the saddest and dorkiest ISFP I have ever seen. And ISTJ/ESTJ for scar.
I may be on the side of the Angels, but don't think for one second that I am one of them. - Sherlock
Don't know who you were but you nailed-it with regards to Billy and Mandy for sure.
Why ESFJ? He's way too reckless and uncaring of social order. If anything, he's too dumb to type.
Mandy I've always seen as INTJ because of how much she hates everyone. Functionally, though, she could be ENTJ: she's as much focused on taking charge and aggression as her vision. But I chalked it up to being an 8, not an extravert. And I thought an ESFP-INTJ duality made sense for them since she willingly spends all her time with Billy; she must care about him even if she doesn't show it.