Akaio Hishiro was a ghoul Bishokuya, one of the First Men, and one of the founders of Hades. He died more than a century ago during the era of the War of the First. He was the father of Akajimaru, the so-called "Red King". He was responsible for the creation of the Ghoul Territory of Aima: which he named after his deceased wife. He was the strongest, wisest, and most humble of all ghouls until his son, Akajimaru, ate him alive and killled him on his birthday: in order to become stronger.