Y/N Maximoff

You were seperated from your siblings Wanda and Pietro Maximoff by HYDRA. HYDRA expiremented on you for years and turned you into something powerful and dangerous. They mistreated you and treated you like an wild animal/a pet/a puppet to use your powers for their own gain. After years you finally escaped and run away, hoping to never be imprisoned again and to finally unite with your siblings again. On your run you get to a city and see humans that need help to get out of a building that's on fire, so you immediately help them get out without any hesitation. Somebody watches you as you're saving them and after you saved everyone he walks over to you.