Mem is a small, cute Memokeeper companion associated with the Garden of Recollection in Honkai: Star Rail. It appears as a supportive, curious, and observant presence tied to memory-related themes rather than a conventional combat character. Mem helps represent the game’s lore around remembrance, perception, and the collection of memories. In the story and related content, it serves as a symbolic guide and companion, adding charm, emotional warmth, and a mysterious tone to the setting.