“A child forced from Heaven and Hell” The kiss Aziraphale and Crowley shared in s2 ep6 caused such a disturbance in both heaven and hell that a child appeared- Crowley and Aziraphale’s child. They are half-demon and half-angel. Not Aziraphale or Crowley have noticed this child appearing. So Aziraphale went to heaven and Crowley stayed on earth being miserable. Now Y/N (their child) goes to find them and hopefully reunite them. :)