In the two years Anne and her family spend in hiding during the Nazi occupation of the Netherlands, Anne undergoes significant personal and emotional changes as she matures and grows. Some of the biggest changes that Anne goes through include the following:

Maturing and growing up

Anne is just thirteen years old when she and her family go into hiding, and for the next two years, she matures and grows into a young woman. She becomes more self-aware and reflective, and therefore starts to think more deeply about the world around her.

Developing her writing skills

Anne starts keeping a diary to express her thoughts and feelings, and over time, she becomes a skilled and talented writer. She uses her diary to explore the complex emotions she experiences during her time in hiding and to document the changes that she goes through.

Forming close relationships

Anne forms close relationships with the other people in the secret annex, including her family, the Van Pels family, and Mr. Dussel. These relationships help Anne cope with the stresses of being in hiding and provide her with a sense of support and community.

Facing difficult circumstances

Anne and the other people in the secret annex face many challenges and hardships during their time in hiding, including cramped living conditions, inadequate food and supplies, and the constant fear of being discovered by the Nazis. Anne is forced to confront these difficult circumstances and find ways to cope.

Struggling with identity and self-doubt

As she grows and matures, Anne grapples with issues of identity and self-doubt. She wonders who she is and what she wants to be, and she struggles to find her place in the world.