
The Great Old Ones are referenced throughout the Cthulhu mythos as malignant gods who once ruled over Earth, and many cults were formed in honor of them. The first connection was introduced in chapter 13 with the mention of beings known as the Great Old Ones. The more concrete correlations to Lovecraft's universe are exciting after Ikeda teased fans with characters who he obviously named after carious Lovecraftian beings that ostensibly shared no similarities. Most of the references he makes earlier on appear to only share a name in common, but the comparisons become much stronger later, especially upon the introduction of the Great Old Ones and the actual monster Cthulhu.
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Those who have only read the first few chapters of Ghost Reaper Girlare unaware that mangaka Akihisa Ikeda finds a great deal of inspiration from H.P. Warning! Spoilers ahead for Ghost Reaper Girl chapter 21!
