The Anna Minifigure from the LEGO Disney Series 2 appears in these sets:
71024 The LEGO Disney Series 2 CMF (Complete Series of 18 Complete Minifigure Sets) (2019)
Anna is the sister to Elsa, the queen of Arendale. Technically that makes her a princess, but she isn’t one of the official Disney princesses. As a child she was been kept in the castle by her parents because of her sister’s powers. Now she is optimistic, energetic, awkward, and generally far from elegant. She is also free-spirited.