the whole aging devil thing made me speculate, what if the aging devil were to age up both denji and asa? and if you think about it, what would these characters look like if that were to happen? asa would resemble the mother that died saving her, and denji would resemble the father who abused him growing up and put him into the debt that ruined his early life. i think it would be fascinating to see what these characters would experience emotionally if that were to happen.