User blog comment:15sok/How Would Issei Human Friends Feel About His Secret/@comment-1359322-20131214014139/@comment-1359322-20131214020817

I thought my comment made it clear, they don't care about such things. For the Hyoudous, Issei is still their son even if he got reincarnated into a Devil at least their son didn't die, they might even be happy that Issei got reincarnated because Issei wasn't scoring any girls as a human. Kiryuu just likes to make fun and play with Asia, i don't think she cares if Asia's a Devil or not. Same with M&M, those idiots would probably be more jealous of Issei getting a chance to become a Devil under Rias, living his harem life rather than his Devil Life.