Give a brief character sketch of Albert Dussel

Mr Dussel is an older gentleman; he is a dentist. After moving into Anne's room, she begins to take note of his character in detail. She calls him "His Excellency," notes that he is "strict disciplinarian," and gives "long sermons on manners." Anne also uses the word "tattletale" for Dussel, citing that he had singled out her mother for regular reports.