Rio kastle AKA Marin

{{Rio is 15 years old, and has dark pink eyes and like her brother, Reginald "Shark" Kastle. She has pale skin and dark blue hair with light blue bangs. Rio also wears a ring on her right little finger, which was previously owned by her brother. Rio's appearance attracts many initial admirers.}} {{Her attire includes a white jacket over a light pink shirt, black stockings, white skirt and shoes. The left coattail of her jacket has a conch-like ornament hanging down. At school, she wears the standard Heartland Academy uniform, with hers being green due to her status as a second year student. She wears longer stockings than most female students. During a trip to Spartan City, she bought a casual outfit composed of a blue-white striped sleeveless T-shirt, a blue upper knee length skirt and white high-heeled sandals.}} {{Rio once Dueled Quattro who was operating under the orders of Vetrix. He played the Spell Card, "Flaming ……