Reincarnation (Eren x Reader)

You lived in a world where there was no violence, crimes, and such. Your whole world grew up kind and caring. When you died from the first crime committed in your world, you find yourself surprisingly alive as an infant, a newborn baby. You also find yourself in a whole other world you've never heard of before: "Shiganshina". You grew up kind and caring from your experience from your past world, and also grew up making a friend, Eren Yeager. However, she had to move somewhere safer, Trost District. Your main goal is to bring peace to this new world, and so, you join the Survey Corps and train hard to bring down every last Titan to bring peace with Eren, who you see again in the Survey Corps.