User blog comment:The Ultimate Pawn/Clarifications on Issei's harem and his peerage/Peerage and Harem Predictions/@comment-199.195.224.47-20170204021859/@comment-31137559-20170204044352

Most likely Bennia is a lot stronger than the person Sona wanted to make her knight. And Bennia came out of nowhere and asked Sona to become her servant after the person she intended wasn't able to. It's not like Bennia was her second choice and Bennia is not as good as the other person. Sona knew nothing about Bennia before then but having a very skilled Grim Reaper in her peerage was just a good opportunity. So that will most likely be insignificant. And she already fits perfectly in Sona's team and Sona has already integrated her in her team. It's just a speculation about her being in Issei's harem. But her becoming Issei's servant? Not everyone who has an interest in Issei will join his harem. And with Jeanne, I don't see Ishibumi just pushing her aside. Why is this the only series where the villains can't be redeemed?