Simplify the following text for a Grade 10 native English-speaking person.
Original: The fifteen-year-old daughter of the Prince Regent , Princess Charlotte Augusta , compared herself to one of the book 's heroines : `` I think Marianne & me are very like in disposition , that certainly I am not so good , the same imprudence , & tc '' .
Simplified: The 15-year-old daughter of the Prince Regent , Princess Charlotte Augusta , compared herself to Marianne Dashwood . She remarked , `` I think Marianne & me are very like in disposition , that certainly I am not so good , the same imprudence , & tc '' .