ʜᴇʀ ꜱɪɴɢɪɴɢ ᴠᴏɪᴄᴇ (Levi x Reader)

What if you had the power to make someone die peacfully when you sing then a song before they pass away? You have never lived in the walls and youre very skilled in killing titans. Levi find you out on expeitions and brings you home. He teaches you your new ways of life. He's supposed to be your mentor and helper- but could this lead to something else??? uwu