This is Shirokami ( a mix between the words "Shirō" which means white, and Ōkami which means wolf) , or Shiro, the closest thing to a fursona I have, but I would describe him more as an "alter ego"
Hes really a spirit in wolf form- the spirit of purity and kindliness, though he sometimes falters and loses his temper. Other than those small mishaps, hes a pretty good guy and tries to do his job.
This form is his true form, though to those without nothing but kindness in their hearts, he appears as a normal white wolf.
He has been killed and reincarnated hundreds of times, but he hates losing himself and most of his memories, so he lately has been staying farther away from danger and being picky about his fights- even though he will eventually have to step out of his comfort zone to challenge Fenris.
His arch nemesis is Fenris, the embodiment of chaos and cruelty.
I'll make my own ref soon, just wanted to get his design down <3