Explain the characteristics of Otto Frank

In Anne's final entries, she notes that her father reprimands her for going upstairs too often; in return she writes him a letter. In the letter she explains that she has been tormented by loneliness since she moved into the annex and hinting that he did nothing to help her with her loneliness. They have a long talk and her father is very upset. Anne feels ashamed and vows to improve her character. Anne no longer sees her father as a man who neglects her emotions. Instead, he is a fully-fleshed man, with weaknesses and strengths, and a fine character.