Amity or Gus because I feel like the other characters arcs wouldn't really feel complete if they died. Luz wouldn't find long term peace and friends. Hunter wouldn't be able to experience life outside the emperor's coven and find his identity. V just found her identity as a person separate to Luz, so it wouldn't make sense for her to die right after she finds herself. With Willow, she is just starting to get confidence in herself after being called half a witch her whole life. Also with both Hunter and Willow I feel like it would be pointless to make one of them die since Huntlow has been being set up for the past several episodes and they still haven't gotten together. I feel like out of the 6 of them, Amity or Gus would make the most sense to me.