The "hero" party is the shittiest human beings. They still insult Rain despite wanting his help. And go fuck yourself priestess, you were trying to manipulate Rain to join the party knowing the fact Rain can not reject this due to his tragic past.
P.S. I know that the villains in this manga are intentionally designed to be one-dimensional villains bad to make Rain and his party/harem look much better in comparison. I still hated the "hero" party regardless.