User blog comment:B214/Question and Answers 6/@comment-75.128.87.76-20161205090029/@comment-195.195.244.67-20161205133622

Yeah Issei has age immortality meaning he can't die due to old age and will outlive his current friends and harem. Although Issei is still classed a devil, you can call him a devil who became a demigod as he was reborn from two gods but since he originally was a human, he is a half-god.