Love Is Difficult, I Am a Psychic

My surname is Su, and I am called Fei. People who know me well call me Ximei. I was born with smiling eyes, but I never understood joy, anger, sorrow, and joy. I thought I was a lump in the elm tree, but I didn't expect that as I grew older, my ghostly eyes suddenly appeared, I was bloodthirsty, I had a keen sense of smell, and I ran like flying. Weird and absurd things happened one after another around me. The death of my family members and my grandma's hesitation in speaking all illustrate that I am different. What am I? As time passed, I shed my ugly skin and stood proudly independent from this world. Only then did I realize that everything was not a mistake but a mistake.