While I'm not the artist or wearer of this art, my best guess for all three would be Fenrir (FYR) fire, fear, fur . FYR was one of three children of Loki's he breed with a witch just before Ragnarok. In the twilight of the gods or Ragnarok FYR bites off the good sword arm of TYR, the best swordsman among the gods of the Aesir. While TYR lost his good sword arm, this ultimately lead to FYR's demise and death. FYR was a wolf, the top image shows him depicted with a sword, the following two images from Fehu or the F rune. This evidence leads me to lean towards all three images being depictions on FYR.
Also the bottom two who are circling eachother may be Austen and Vesten. Austen would chase the sun in attempt to devouring it, Vesten would circle the moon trying to devour it. The two circling each other might be evidence these two are a depiction of the two.