Further consideration on the nature of monsters in textual analysis: 

Monsters: Evil Beings, Mythical Beasts, and All Manner of Imaginary Terrors by David D. Gilmore

Monsters are the patron saints of otherness.

Monsters, by Tasey A. Rosolowski from Southwest Review Vol. 84

People adore monsters. They fill their songs and stories with them. They define themselves in relation to them. You know what a monster is, young shade? Power. Power and choice. Monsters make choices. Monsters shape the world.

The Monsters and the Humans, a chapter from The Celebration of Death in Contemporary Culture by Dina Khapaeva

And I think accepting that you are a monster gives you the leeway to not behave like one. When you deny being a monster, you behave like one.

Classic Readings on Monster Theory: Demonstrare, Volume One as edited by Asa Simon Mittman and Marcus Hensel

A monster that refused, sometimes, to behave like a monster. When a monster stopped behaving like a monster, did it stop being a monster? Did it become something else?

Narrative Performance in the Contemporary Monster Story by Daniel Punday from The Modern Language Review Vol. 97

But perhaps the monsters needed to look out for each other every now and then.