Alastor is a former radio host and southern serial killer hailing from New Orleans, Louisiana.
He lived during the early 20th century, having witnessed the Stock Market Crash of 1929. He died in 1933.
When Alastor arrived in Hell, he possessed raw power, which was never before seen in a human soul, and trampled powerful demons who had been in charge for centuries.
He then broadcasted this carnage on the radio for everyone to hear, thus earning the title "The Radio Demon".