Mutsuki is a Mutsuki-class destroyer from the Sakura Empire in Azur Lane. She is depicted as a young girl with a sleepy and timid personality, often yawning and seeking naps. Despite her drowsiness, she is cheerful, values her friends deeply, and participates eagerly in nighttime operations. Known for her line 'Tonight, Mutsuki will sink the enemy!' she embodies the energetic spirit of a destroyer while struggling with sleepiness. She cherishes small animals and has a close bond with her destroyer sisters.