Mother in Wanwa the Puppy is a figure defined by her absence and her emotional centrality within the boy's dream adventure. She appears initially as a warm, nurturing presence in the real world, but the story is triggered by her kidnapping, which plunges the protagonist into a chaotic, crayon-like dreamscape. Her background is that of a pregnant woman, and the boy's journey is deeply tied to his feelings about her pregnancy, a mixture of fears, hopes, and joy. Her personality is not explored in detail within the short film, but her role as a loving, protective parent is established through the boy's gratitude toward her and his determination to rescue her.

Her motivation is simply to care for her child and carry her pregnancy, an event that becomes the emotional core of the narrative. In the story, she functions as both the catalyst for the adventure and its ultimate goal. The boy battles ogres and befriends the dog Wanwa specifically because of her kidnapping, making her rescue the driving objective. Her key relationship is with her son, the protagonist, whose entire journey is an expression of his love and concern for her. The boy's father also appears as a character, but Mother's bond with her son is the primary emotional relationship. She undergoes no direct development herself, as she is more of a symbolic figure than an active participant in the dream events. Her notable ability is simply being the emotional anchor of the story, representing safety, love, and the hope of returning to normalcy. The dream world's bizarre and chaotic elements all stem from the boy's subconscious processing of his mother's pregnancy and her sudden removal from his life.