The answer to this question should be constantly evolving if we truly are doing just that. The truth is, our core being and the foundation of truth of who we are is always ONE IN PROGRESS if we are open to change, growth, development and becoming more of who are to continue to become in order to to our life's work with more purpose, more passion, greater declaration in our wilingness and openness to help, teach, learn,share, love and live.
Some people will look at this question and answer as their human selves.
Some people will look at this question and answer as their soul selves.
Some will define themselves by how they think they should answer this question.
Others will have learned that we cannot be solely defined by what we do, what we dream or even believe on any given day - as life is a continuous journey of self-discovery and rediscovery; growth and change.
When we take the time to step back to reflect, think, feel, understand - we learn even more about who we are in how we show up and how we share. And it does not always have to be in words... spoken or unspoken, action or reaction independently or collectively. Sometimes who we are is simply being and basking in where we are in the present.