Ban X Reader (Seven Deadly Sins) The sin of death

Y/N is the sin of life. She once was a normal human but she made a deal with a demon in order to bring her little brother back to life. The deal was that he would take her soul in return that her brother is brought back to life. When they agreed on the terms, the deal was sealed. In result of her soul being eaten, she should have died but she didn't, instead he life was change forever. She soon relized that the demon was dead and her brother was still gone, because of this, she tried to kill herself but it failed. Her body kept going back to normal. After about 50 million tries, she gives up. She starts to travel the world in search of powerful people that can kill her. On her journey she incounters Melliodis and the sins. Instead of tring to kill herself, Melliodis convinsis her to join them, so she did. After a couple of years she ends up deveopling feelings for ban. What will happen when they get split up? How will this effect her feelings? What is ban going to do? Will ban choose Y/N or Elaine? Who knows? Not me LOL