Mr. van Daan - The father of the family that hides in the annex along with the Franks and who had worked with Otto Frank in Amsterdam. He shows his talent as an herbal specialist when the family receives a large amount of meat. According to Anne, he is intelligent, opinionated, pragmatic, and somewhat egotistical. Anne considers him to be an insufferable know-it-all, though she reserves the majority of her ire for his wife. Mr. van Daan is temperamental, speaks his mind openly, and is not afraid to cause friction, especially with his wife, with whom he fights frequently and openly.

Mrs. van Daan - Mrs. van Daan is one person that Anne can’t stand. She’s belligerent and selfish, always instigates fights, and rarely helpful. She is a fatalist and can be petty, egotistical, flirtatious, stingy, and disagreeable. Mrs. van Daan frequently complains about the family’s situation—criticism that Anne does not admire or respect.Her character does not seem to change over time. She is jealous of Anne’s relationship with her son, wanting Peter to confide in her rather than in Anne. However, Mrs. van Daan does have a few strong points. She occasionally can be reasonable and backs down from fights, is generally neat and tidy, and is often easier for Anne to approach than her own mother.

Peter van Daan - Through Anne’s eyes at the beginning of her diary, Peter is lazy and has a weak character. He’s also shy and extremely awkward. But a year and a half after they’ve been in hiding, Anne suddenly starts to notice that Peter looks at her with longing. Soon she has a crush on him, and decides that he is very sweet and desperately in need of affection, which she tries to give. But Anne is soon disappointed with Peter. He doesn’t like religion and he is too lazy and weak to improve himself. He seems satisfied with mediocrity and takes the easy path in life rather than one