This is from the series of miniature elemental dragons performing everyday tasks. :3

And the last one: shadow!
This one was a bit harder to describe the idea for. They not only like the nighttime, but will hang out in other's shadows, and can manipulate their own shadows. In this world, they're your guardians at night. :D

Designs ©  firondraak and  acidapluvia
Art ©

Element Designs: https://www.furaffinity.net/view/16536098/
Ice: https://www.furaffinity.net/view/16536286/
Fire: https://www.furaffinity.net/view/16536324/
Electric: https://www.furaffinity.net/view/16536368/
Earth and Water: https://www.furaffinity.net/view/16536406/
Shadow: https://www.furaffinity.net/view/16536449/