Which TaskForce 434 member should I make an origin story of next?

For anyone who's read the TaskForce 434 Missions: Origins: A Ghost Story, this is just me asking you, which of the characters above should I make a story of next? If you don't already know, A Ghost Story was the origin story for Ghost, so now I want you to tell me which character to do next, and what the name should be for the comic! The names of the characters are: Skull, Specter, Grim, Reaper, Ghost, Wraith, Ghoul, Silver, and Phantom, it goes from left to right so go ahead and tell me which character I should make an origin story of next, along with the name of the origin story and I'll probably have the first part of that story posted, maybe next week, starting next friday.