In Greek mythology, Echidna (; Greek: Ἔχιδνα, "She-Viper") was a monster, half-woman and half-snake, who lived alone in a cave. She was the mate of the fearsome monster Typhon and was the mother of many of the most famous monsters of Greek myth.
Baku (獏 or 貘) are Japanese supernatural beings that are said to devour nightmares. According to legend, they were created by the spare pieces that were left over when the gods finished creating all other animals. They have a long history in Japanese folklore and art, and more recently have appeared in manga and anime.
The Japanese term baku has two current meanings, referring to both the traditional dream-devouring creature and to the Malayan tapir. In recent years, there have been changes in how the baku is depicted.
