Asia Argento

As befitting a nun, Asia is extremely shy, innocent and fairly inexperienced in things like socializing. Despite being reincarnated as a Devil, Asia still believes in God and follows His teachings such as praying to Him and reading the Bible, which would usually result in her getting severe headaches. Even when she was human, she harbored no hate towards Devils and treated everyone equally, regardless of what they were. Asia was also in deep shock when she learned from Kokabiel that the God of the Bible was dead.

Asia became more "bold" in her relationship with Issei when the girls start being intimate and dislike the idea of being left out. Asia thinks of Issei very highly, and wants to stay with him forever. However, she will pinch his cheek whenever he lusts over other girls and despite being shy, she will beat or slap someone like Diodora when they insult Issei.

Asia was abandoned by her mother when she was a baby and was raised in a church. Some time during her childhood, she gained the ability to use her Twilight Healing and became known as The Holy Priestess. It was during that time that Diodora Astaroth devised a plan to have Asia heal him, a Devil, and caused her banishment from the Church with people labeling her as a "witch". With no place to go, Asia had to rely on the Fallen Angels.