User blog comment:B214/High School DxD EX/@comment-26527700-20160313035303/@comment-26527700-20160315014421

I was slightly confused by the use of Amon in Jop's summary as well but the Katekana used is clearly マモン not  アモン. Since there is no house of Mammon among the 72 pillars and the name is affiliated with devils, it's likely an extra demon house like Belphegor.