Is it ok to answer, "I am smart, I am kind, and I am strong" to the question, "Who are you?"?
Your response is grammatically correct English. But it doesn't answer the question.
"Who are you?" is asking for you to identify yourself. The reply should be "I'm Jean" (or I'm Nathan). It isn't asking to describe yourself.
So it is not correct to answer "I am smart (etc)" to "Who are you?"
If someone says "Tell me about yourself" you might say "I am smart..." but it sounds very arrogant.