His name is Lord Ludomir, and he's a hellhound/wolf hybrid!!
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Artwork credit:  majima
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His bio/origins:

The domestication of wild wolves have given both human beings and dogs a tremendous benefit. It's because of human companionship that feral canines have evolved along side with their humans. Ludomir was a very excellent fighter, and it was his talents that got him to the top apex of Spartan society. It was because of his fighting spirit that Ludomir was granted a role along side the Spartan warriors, and eventually a guardian of the Greek City states. Ludomir participated in domestic Greek warfare and even fought against their enemies. He grew fond of his fellow comrades and was given tremendous luxury, whether it included huge morsels of meat or other dogs to treat himself to. Nonetheless, everyone loved him for his service and worshipped him after his death. Dying of old age, the Greek gods found him to be an extraordinary specimen and decided to immortalize him because of his god like bravery. Ludomir lived on for generations and gained much wisdom throughout his years. After his previous masters passed away, he has decided to roam the old world by himself, though it did prove difficult as times have changed. People didn't worship demon like creatures like himself as a worthy adversary with respect, rather a threat. Up until a point where he happened to stubble across a man who shared the same faith. Both, mocked by society for their appearances without realization that these people once lived prospered lives, and gained the respect of everyone they encountered. From then on, Ludomir has been announced with the title: Lord, Lord Ludomir.