User blog comment:B214/Volume 22 spoilers/@comment-185.112.105.215-20161011161249/@comment-74.58.219.123-20161012200211

Hades is not an Evil God. In Volume 10, after the Gremory Group meets Hades for the first time before the Rating Game against Sairaorg, Issei asks Azazel if Hades is an Evil God and Azazel says no and that he just hates Fallen Angels and Devils. Loki and Balor are the only known Evil Gods in the series.