Erza is an S-Class Mage and considered the strongest woman in Fairy Tail and Team Natsu. She was a slave in the Tower of Heaven along with Jellal, Wally, Sho, Millianna and Simon who, after escaping, followed the advice of an old slave and joined the main guild. She was also temporarily the 7th Fairy Tail Master during Makarov's absence. *Credits: -Evaan -KaosKatsu https://www.pixiv.net/en/artworks/121136492 :)