Shattering Timelines Back and Forth

How would you feel if one day, everything you knew was gone, murdered, and you were hopeless to stop it. What would you do? Would you wallow in your pain and wait for death or would you fight to keep it from happening to someone else?

(So, just go on and assume I own none of the characters here. All in show characters belong to Rebecca Sugar. If you want to know who made the rest, go check out the story on Archive of our Own.)