A detailed anime illustration of a tall, slender female swordsman named Serene, shown in a full-body standing pose. She has extremely long, straight silver hair flowing past her waist, with a small portion at the back tied by a thin black cord. Her sharp red eyes gaze slightly to the side with a calm, unreadable expression. Serene wears a high-necked black combat inner garment with a single thin silver line running along the neck and clavicle area, layered under a lightweight black-and-silver chestplate featuring a small red gem at the center. Her right shoulder is protected by a small silver pauldron, while her left shoulder remains bare. She wears long black gloves extending to her elbows, adorned with silver lines on the back of the hands. Over her outfit flows a long black coat with a high collar, reaching below the knee, its interior lined in deep crimson visible only when the coat flares. At her left hip hangs a black scabbard with silver fittings containing her sword 《月喰》, which she lightly holds in place with her left hand. Her lower half is clad in fitted black combat pants with a small thigh pouch, and black knee-high boots with silver clasps. She wears a single small red gem earring on her left ear. Her posture is upright and composed, one hand resting in her coat pocket while the other rests near her sword, exuding quiet strength and elegance.