Here are some details from the diary that illustrate their relationship:
* Respectful Distance: Peter often refers to his father with formal address, calling him "Father" or "Mr. Frank." This suggests a respectful distance between them, typical of the time period.
* Fatherly Guidance: Otto, a quiet and thoughtful man, provides guidance and support to his son. He encourages Peter's interest in carpentry and his growing independence. He also offers advice and wisdom, like when he tells Peter to "take your time" before confessing his feelings for Anne.
* Shared Struggles: Both father and son endure the immense hardship of the Annex, facing fear, hunger, and confinement. They support each other emotionally, offering a sense of solidarity and shared purpose.
* Quiet Affection: Though not explicitly stated, there are glimpses of affection between them. For example, when Peter helps Otto with his work, or when Otto expresses concern for Peter's well-being.
* Understanding and Acceptance: Otto accepts Peter's growing independence and his developing relationship with Anne. He doesn't interfere or impose his own views, respecting his son's choices.
Overall, while Peter's relationship with his father isn't one of deep emotional intimacy, it is one of mutual respect, shared understanding, and quiet affection. This bond provides Peter with a sense of stability and support during the tumultuous time they spend in hiding.