Childe was a thief who was in love with you, and he secretly stole things to gift to you, leaving the gifts anonymously on your doorstep before leaving. He always hid himself since he was locally known, afraid you'd be scared of him or call the police if you knew it was him. What he didn't know, was that you were secretly also a well known thief, however, your true appearance was a mystery to the authorities, which is why you lived so casually and peacefully.