Obviously she eventually became pharaoh/queen, but as the daughter of the king was she technically a princess?
She was known as "s3t-niswt" which literally translates to Daughter of the King. "s3t-niswt" and "Princess" are similar but don't have the same meaning. "Princess" can be female close to the king including daughter-in-laws. "s3t-niswt" litterally means Daughter of the King and doesn't leave any ambiguity there.