beware of dog and his puppet on strings

These two are characters from a story I'm working on and plan to fully develop and write to eventually animate it into a show, called Some Dogs Don't Go To Heaven. As the title may imply, the shortest summary to this story is that it revolves around a human turned hellhound that has been alive for centuries causing chaos and being a general villain and bastard, alongside his unwilling puppet Oliver who's only just recently become a puppet (and then a demon himself) when he rlly just wanted to have a chance at life but Von said "fuck you."