Here are some key aspects of his character:
* Protective: Otto Frank is deeply protective of his family, doing everything he can to keep them safe during the war. He is the one who decides to go into hiding, putting his own life at risk to save his loved ones.
* Resilient: Despite the hardships of living in hiding, Otto Frank maintains a positive attitude and tries to keep his family's spirits up. He often tells them stories and plays games to make their time in the Annex more bearable.
* Loving: Otto Frank has a close and loving relationship with his daughters, Anne and Margot. He encourages Anne's writing and is always there to offer her support and advice.
* Quiet and reserved: Unlike Anne, who is outgoing and expressive, Otto is quiet and introspective. He often prefers to observe and listen rather than express himself openly.
* Determined: Otto is determined to survive and to see his family through the war. He is constantly looking for ways to improve their living conditions and to protect them from danger.
It's important to remember that the book is written from Anne's perspective, so our understanding of Otto Frank is filtered through her eyes. While she admires and loves her father, there are times when she also criticizes him for his reserved nature and his seemingly distant personality.
Overall, Otto Frank emerges as a compassionate, strong, and deeply devoted father who does his best to protect and support his family during the darkest of times.