A medium shot from a side view portrays Gran Alegria from Umamusume as a mermaid, gliding gracefully through a luminous underwater kingdom. She has horse ears and a long, shimmering fish tail that curves elegantly in the water, with iridescent scales that reflect a spectrum of colors. Her expression is serene and curious, with her hands gently resting against her chest as she floats. She is adorned with delicate sea-shell accessories and flowing, translucent fabric that drifts around her like silk. The environment is a vivid coral reef filled with glowing anemones, tiny floating bubbles, and schools of colorful tropical fish swimming in the distance. The lighting is ethereal, with shimmering rays of sunlight piercing through the deep blue water from the surface, creating a dreamy, magical atmosphere with a palette of deep aquamarine, teal, and iridescent golds.