An unnamed dog is a dog that usually steals Satania's melon bread as a running gag until he later becomes her pet.
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- From his appearance, Dog's breed can be a white German Shepherd or an Akita Inu. However, considering that those breeds are large, Dog is either still a pup or he is a mixed breed.
- Alexander, Satania's Demon World pet dragon also acts like a dog as he barks and do dog tricks. This maybe the reason why Satania shows no problem when she adopts Dog.
- While Dog was still wild, he is considerably closer and more friendly to Raphi, who loves to tease Satania.