Seven Secrets of the Scarlet Citadel

Zula has a doll that she shared with Immorta that can touch Immorta's mortal self and consciousness. Entire realms of the Scarlet Citadel only exist in the other side. Gellert is a practitioner of void magic. He loves him. And her daughter has summoned two creatures, right? Two of the, what are they called, anchors. One of them existed well before Immorta or Gellert had arrived. That being, and that anchor is which one?