* Rin's sickening torture sequences at the hands of Sayara.
* The "dietary habits" of Angels in this universe.
** The angels themselves are pretty nightmarish in and of themselves, even when they aren't eating.
* The ending to Episode 5.
* The root of the Yggdrasil.
* Near the end of episode 6 when the red egg opens up and the hands of all the women come out and drag Rin inside.