Her life is much like the others, where they have to do various things in the name of survival, so TLoU2 parallels her with Ellie, who is also set on getting her revenge. This is her reason for getting revenge on Joel and murdering him in cold blood.
We all know what happened to the doctors in the operating room when Joel barged in to rescue Ellie (if you need a refresher - he killed all of them). Final Warning: Major spoilers Ahead! You have been warned!!Ībby used to be a Firefly member along with her dad, Jerry Anderson, who was the lead doctor set to perform surgery on Ellie during Part 1.