User blog comment:FrankieX98/The future members of the Issei's harem and peerage./@comment-2208155-20180904200326/@comment-2601:87:8300:20D0:5584:F23B:D5B5:DAFA-20180907165236

I doubt Age matters when it comes to the harem, only Issei's state of mind. Ingvild over 100, he wouldn't touch kunou (not yet) and if Verrine is an option technically she only has a body of a teenager since I don't think a year has been by while she was created. I honestly think for this story is personality is important and circumstances otherwise he just admires the view.