Rias has lots of affection towards Issei from the beginning on the sequence, which seemed to have developed since the series progressed. This is highly attributed on the Gremory's inclination to have close relations with their servants in comparison with other clans. Y/N has moved to Kuoh City along with https://vivushirt.com/product/qtr-likauce-i-love-highschool-dxd-rias-gremory-t-shirt/