YOU SAID:

My sister looks cute in her braces and boots, A handful of grease in her hair

INTO JAPANESE

私の妹は矯正器具とブーツを履いて可愛く見える、彼女の髪には一握りの油が付いている

BACK INTO ENGLISH

My sister looks pretty in her braces and boots, she has a handful of oil in her hair

INTO JAPANESE

私の妹は矯正器具とブーツを履いてきれいに見えます、彼女の髪には一握りの油が付いています

BACK INTO ENGLISH

My sister looks pretty in her braces and boots, she has a handful of oil in her hair