Sirius was born as the only child to his father, he was given a first ear piercing by his father as proof of the Anubis tradition.

Art by @seyumei

"Betray...Return? Pray tell, what is this you speak of? Did I call you "king" but once? I've been waiting all this time...for you to lower your guard so I could strike. 'Tis as I said before. "My position has not changed. I serve the true king." And that king, Set...is not you. Strangely, he wears a human form at present...but I have only one king. This personage alone!!"

Sirius - Niehime to Kemono no Ou || Sacrificial Princess and the King of Beasts