Kayla and Ellen discuss the events of chapters 3 and 4 of the manga.

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Some sources were discussed:

Mononoke:

http://www.japanecho.com/sum/2006/330516.html/

https://en.wikipedia.org/wiki/Mononoke

“The Ashgate Encyclopedia of Literary and Cinematic Monsters” edited by Jeffrey Andrew Weinstock

The Chinese zodiac and ornaments:

https://en.wikipedia.org/wiki/Chinese_zodiac

https://zoomingjapan.com/items/japanese-zodiac-figures/

Also briefly mentioned:

“How to Read Literature Like a Professor” by Thomas C. Foster