The person appears to be a/an Black Female, approximately 30 to 39 years old.
The grammatical mistake in the sentence is a verb conjugation error. The correct form of the verb should be 'read' instead of 'readed'. 'Readed' is not a valid form of the verb 'read', which is correctly used in the past simple tense as 'read' (pronounced like 'red').
The grammatical error in the sentence is a verb conjugation error. The correct verb for the sentence should be 'read' instead of 'readed'. 'Readed' is an incorrect form of the verb 'read', which should be used in the past simple tense as 'read' (pronounced like 'red').