The Sphenoid bone is part of the human neurocranium, a collection of bones in the skull that forms a protective case for the brain. It is located behind the eyes.

Perhaps the most striking thing about this bone is how it resembles a pair of bat or butterfly wings, like this:

It kinda matches the shape of the communication mask thing Hawkmoth uses as well:

“We have an akuma inside us all.” -Mod Jae

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