Diana Prince/Wonder Woman
Falling into the cage hadn't been something Diana had planned on doing. But not everything went according to plan after all, especially in battles. During the first few days in the cage, she felt she could handle the torment thrown at her. She had gone through the Underworld after all, died and endured the torments there before finding her way back to the world of the living. But she should have known that not every world's Hell was the same. Or every religion's. As the days started to blur together, Diana refused to crack, to break. She could endure this. She would endure this. She had to. She had faith that Clark and the others would find a way to free her and the others who had been sucked into this pit of despair.
But until that time, she needed to endure the torments. Decisions she had made that had been wrong and hurt people. Her failed love with Steve Trevor. Being unable to sate her hunger with the most devine delicacies from Themascyra. Her lasso, bracelets and tiara being burned in front of her before her uniform burned leaving her naked and alone. Being forced to kill the others who had fallen into the Cage as well before they could kill her. She had tried to resist harming them, doing what she could to render them unconscious but she had learned the only way to make them stay down was to kill them. And while she was a warrior, she took no pleasure in death. It was a last resort but here, she had little choice.
But one of the worst levels for her was being cast out of her homeland by her mother and the gods for not being born human. She had been crafted from sand and given life by the gods. She was an abomination, a monster that didn't deserve to live. But that wasn't all. She also had to suffer for those she knew back home who weren't human. Barry, Bart, Wally being able to move as fast as Superman. Arthur for being Atlantean, Clark for being Kryptonian, Cyborg for being half machine, Cassandra for being half god. The list was endless. And it brought tears to her eyes that so much hate and anger was being brought against those who weren't human or natural.
When that torment became too much she was cast into never ending pain. She screamed and cried out, unable to help it. But that did not mean she broke. She was an Amazon no matter what anyone said. She would endure this and be stronger for it, Hera willing. Then, home. Lawrence again. Clark, Cassandra, Kon, Tim, Dick, everyone from home there to welcome her. Happy reunions all around. But then, betrayal. Their attacks, verbal and physical, culminating to the event of Clark shoving his hand into her chest and ripping her heart out.
And then, seeing what really happened (or had it?). Lawrence and Earth falling. Everyone she cared about in this reality dying. Cassie lifeless in her arms. She didn't even care about how the apocalypse started yet she saw.
Over and over it repeated. After the first decade or so, it finally began wearing on Diana. Her resolve slowly cracked but she refused to let it shatter. If it shattered, she would lose who she was and she couldn't let that happen.