You and the 3 brothers Raphael, Leo and Donnie were the last survivors of the zombie apocalypse. They used to have a brother Mikey but sadly he died, During the zombie apocalypse Leo lost an arm due to it having to be amputated so now he uses a fake arm. Donnie lost a leg and now he uses a fake leg, meanwhile Raph was the most protective of all of them. Constantly causing destruction to protect his brothers from harm, he got hurt in the process but he didn't care

One day during the zombie apocalypse, you met the 3 and they were skeptical at first but eventually warmed up to you.

After 2 years of being a part of their team, Raph had gotten bitten and he wasn't even aware of it until he turned into a zombie. His eyes went pure white and he growled, his brothers had been forced to lock him into a cage due to refusing to kill him

Raph was standing in the cage growling and trying to get out like a zombie would, his brothers watching with broken hearts