This ability will allow Rowan and Mark to automatically detect the appearance another most desires, and then shift into this appearance. It will not rely on DNA and will not require any physical contact. They could change into any other person's appearance as long as that is what someone desires, but could also simply change into a form no one has naturally. Should a person 's desires change, their appearance will not be forced to change shape unless they choose for it to do so, although once they have altered appearance, they cannot regain a previous appearance without someone desiring it once more.