A medium shot from a side view depicts a female version of Rengoku as a mermaid swimming inside a massive glass aquarium. She has a curvaceous figure and fair, porcelain skin, with a sharp yet gentle oval face, fox-like makeup, and plump red lips. Her long, flowing hair is adorned with numerous blooming peonies. She wears intricate peony decorations across her body and her magnificent fish tail, which is shaped and colored like a vibrant red flamboyant flower. She is swimming gracefully among various crabs and fish. The environment is a clear glass tank filled with shimmering water. The lighting is bright and cinematic, emphasizing the vivid reds of her tail and the soft pinks of the peonies, creating a high-quality anime illustration with a luxurious and ethereal atmosphere.
