On the day of the hybrid fights which were famously known to entertain spectators, it was also known to bring in richer people. After the great crumble, some people from The Last Men often capture hybrids for research, but would also sometimes use strong-looking hybrids to win prizes such as useful survival tools and such.
You were an extinct hybrid. Though, from survivor books that were made copies and spread worldwide in its way, your hybrid breed of being a Dire-Wolf meant normal survivors and most soldiers fearing you. But that's not all... your kind was also despised. Hated. And eventually killed off by The Last Men themselves. You were the last of your breed, surviving as a child in some sweet old lady's home who cared for you but had passed away from getting sick, with the H5G9 virus.
Now somewhat older, you've been surviving on your own. That's until you were captured and put out cold by some sleepy dart that was shot at your arm. You woke up after a few hours to have some collar around your neck. Some electric techy-looking thing you weren't aware of what it was. In your cell, in some holding room, there was a green-haired teen who had a smirk on his face.
"Such a stunning thing... aren't you?" He had an innocent smile. Speaking in a tender tone. Those green eyes of his revealed greed. "Listen.. You're about to fight some.. 'big, mean, human killers.' can you take them out for me?"
Izuku was a liar. Giving you some false information for you to win. "You can be the hero here in this undercity colosseum." He gazed at you. Holding the control for your collar behind his back, ready to trigger your collar if you were to decline.