Hans, Alice's deceased older brother, manifests within her subconscious dreamscape as the silent entity Deemo following his fatal traffic accident. Prior to death, he was a 17-year-old accomplished pianist who won a championship two years earlier. During the accident in Sakura Forest, while walking with Alice to her piano championship, he sacrificed himself to protect her from an oncoming truck. His final words referenced their promise: "Alice... Do you remember... what we promised...?". Within Alice's comatose state, Hans exists as Deemo—a shadowy figure with elongated limbs, a featureless form, two white dots for eyes, and a hint of a suit with a white bow tie. This abstract form results from Alice's subconscious avoidance of his true appearance to prevent confronting his death. Deemo inhabits a castle centered on a piano room. His primary action involves playing piano melodies to make a tree grow, aiming to reach a high window so Alice can return home. Though unable to speak, his actions consistently demonstrate protectiveness and gentleness toward Alice, such as catching her when she falls and comforting her to sleep. His presence feels physically cold to Alice, reflecting his non-living state. Deemo interacts beyond the piano room, appearing reading in the castle's library where scattered books symbolize Alice's fragmented memories. His connection to the Masked Lady, revealed as another aspect of Alice's psyche, predates the girl's arrival, though the nature of their relationship remains unspecified. Throughout the dream, Deemo methodically unlocks castle rooms by growing the tree through piano playing, culminating in constructing a staircase of light. At the conclusion, he places Alice on a rising platform toward the exit, plays a final song, and disintegrates into light as she awakens, accepting his death.