In Volume 22, Rias was there to allow Issei to be promoted to High-Class devil, during the ritual in which she placed the crown on his head, which made Issei a King. Later the two become engaged when Issei proposes to Rias after her graduation ceremony, making her his first bride.
DO Rias and Issei get married in the anime?
Phenex Clan As Issei is about to be killed by Riser, Rias pushed Riser out of the way and agrees to marry him to spare her servants life. Their engagement was eventually null and voided when Issei crashed their ceremony with the help of Sirzechs and defeated Riser in their one-on-one rematch which won him her heart.
Does Issei marry Rias in Season 4?
After seasons of misunderstandings and one-sided confessions, Rias and Issei finally confirmed their love for one another by episodes end.
How many wives does Issei Hyoudou have?
Currently Ise is engaged to. And Ravel, Yasaka, Kunou(will be introduced in season 4), Roygun,Elmenhilde(vampire), Le Fay Pendragon, Ingvild Leviathan(will be introduced in Novel) are future members to be added in the harem.