User blog comment:B214/High School DxD EX/@comment-79.50.160.94-20160128004820

How his children call Issei...

Kurenai: "Tōsan" Airi: "Otōsan" Zen: "Oyaji" Shin: "Papa" Ex: "Oyaji" Shirayuki: "Chichi-sama" Kurobara: "Papa" Helmwige: "Otōsan" Robertina: "Otōsan" Ernestine: "Chichiue"