If you are looking for synonyms for the phrase "charming free spirit," you might consider using words like vivacious, carefree, and bohemian. These terms all convey a similar sense of someone who is lively, unconventional, and independent-minded. Other possibilities could include descriptive phrases like "uninhibited adventurer," "unrestrained thrill-seeker," or "unconventional iconoclast." Ultimately, the choice of words will depend on the context in which you are using them and the specific shade of meaning that you want to convey. Whatever your choice of synonyms, the central idea of a lively, free-spirited individual is sure to shine through.