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I doubt Kiemis can feel loneliness, she's very small brains and lives on instinct.

It would depend on whether her species is social. If she does not have insticts for social behavior, then she will not feel lonely.

Snakes by and large are not considered social animals, albeit there are few exceptions like the rattlesnakes and possibly garter snake. Corn snakes, as far as I've been able to research, are solitary. I may be wrong, but there's nothing to suggest they mingle and have get-togethers. Those rare occasions they do meet, they do it for mating purposes, before parting and going their separate ways again.