User blog comment:B214/Volume 23 discussion blog/@comment-201.215.165.7-20170528232130/@comment-1359322-20170530014753

People also said Serafall could fall in love with Ise till she entered the barrier. So it may be a pipe dream.

Besides, Ishibumi seems to have kept the theme of newer generation taking over older generation for this series which seems to apply to Ise's relationship too. You haven't seen Ishibumi trying to outwardly push Ise with Serafall, Gabriel, Yasaka etc except for teasing or fan-service purposes.