Mavis Vermilion is the love interest of Zeref Dragneel in Fairy Tail.
The First Master and the founder of the Fairy Tail Guild. She is also referred to as the mother of Fairy Tail. In year X686, Mavis, along with Precht, Warrod Sequen and Yury Dreyar, founded the Fairy Tail guild, with Mavis being the guild master. As they finally finished the guild building, all four took a photo with the building in background as a sign that Fairy Tail was born. She later entrusted the guild to Precht to serve as its second master. In gratitude, members of Fairy Tail made her a grave on the holy island of the guild - Tenrou Island. Mavis was given with an epithet as the Fairy Tactician, since she led her team in many victories thanks to her exceptional skills in making strategies during battles.
In the past, Zeref met Mavis and he taught her magic. Because Mavis used an incomplete version of the magic Law, she became immortal like Zeref and eventually received his curse to kill anything around her. Mavis proposed Zeref to live their immortal lifespan together and find a way to break the curse together. They fell in love and shared their first kiss. However, Zeref ended up killing Mavis as his curse kills anything he loves.