free spirit
US /ˌfriː ˈspɪr.ɪt/
UK /ˌfriː ˈspɪr.ɪt/
1.
a person with a highly individual or independent character
:
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She's always been a free spirit, traveling the world and living life on her own terms.
•
His artistic nature and unconventional lifestyle marked him as a true free spirit.