i know humanoids are easier to work with but i would recommend at least one 1/2 beast character like the Lamia or Centaur (leaning to Lamia myself) and some kinks can be tied to them that way if someone doesn't want to deal with said kink they don't have to go with that character, like constriction with the Lamia and the tail or possible rope play with the Arachne. just some thoughts :) but i cant wait to see what you come up with