Talk:Monster Musume: Everyday Life with Monster Girls Online/@comment-27318737-20151214090610/@comment-25569977-20151214201638

Well the Empusa of myth (in terms of the Demigoddess) was basically a vampire. She used to lure young men and drink their blood to sustain herself, so that's where the Vampire aspect comes from.

The Empusa is a genus of the mantis, so that's probably where the mantis part comes from :p