User blog comment:Miskos3/Fairy Tail 520: Dragon or Demon, Review/@comment-1359322-20170204110507/@comment-1359322-20170204142403

Yeah and a drunk Erza acting differently means she has another distinct personality in her.

Hell the Demon Seed can talk with Natsu in his mind and tell Natsu, "hey Natsu, Demon Seed here, i'm here to inform you that i'm taking over your body to kill Zeref".