Reginald Kastle, known as Ryoga Kamishiro in the Japanese version, was a human child who died in a car accident, with the soul of the Barian Nash continuing Reginald's life after his death. Shark has dark blue eyes, pale skin and dark purple hair, which resembles tentacles hanging down, referencing his Deck theme of aquatic creatures. These "tentacles" slightly resemble pigtails, but curl up on the end. He also has a light blue "crown" in front of his forehead. His accessories include a grey, shark tooth-shaped locket, which contains a family photo of his parents, as well as himself and his sister Rio Kastle as children. He also has a scar on his right shoulder.[12] He also wears two grey rings on his right hand, but he later gives one to Rio.[13] He also owns a grey and green Duel Gazer with a red lens and a yellow spike as well as a blue D-Pad. Upon regaining his Barian identity as Nash, he threw away the locket and replaced it with his own Barian Emblem pendant, though he regained the locket after his revival. As a child, he wears a white collared shirt under a dark blue best and has plain jeans with brown shoes. He is characterized by his cool, cocky, and confident personality, initially presenting as a #1 school bully with a reputation for being both respected and feared. He has a complex personality with a soft side, particularly towards his sister and Yuma, but can also be insensitive at times. Later, he undergoes a transformation, becoming more humble and loyal to his friends. Rio Kastle, known as Rio Kamishiro (神代かみしろ璃緒りお Kamishiro Rio) in the Japanese version, was a human who died in a car accident, with the soul of the Barian Marin continuing Rio's life after her death. Rio has dark pink eyes and like her brother, she has pale skin and long, thick, spiky 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, including Bronk. Rio Kastle as a child has a magenta dress with a white collar and fluffing on the top. she also wears black tiny shoes. Rio Kastle has a incredible adament side and loyalty to her friends and brother. she has an empathetic side shown for example when helping tend bronk's injuries. She has a childish side too shown by her fear of cats and calling shark a meanie. Reginald and his twin sister Rio lived in a mansion with their parents. One night, Reginald was chasing Rio around the house after she stole his Deck of Duel Monsters cards that his father gave him. Their fighting resulted in a suit of armor nearly falling on Rio, but Reginald pushed her out of the way, earning a scar on his right shoulder.[1] One night, Reginald and his family were traveling in a car and Reginald was looking at his cards with Rio asking if he could teach her how to duel when getting home and Reginald teased her gently by saying only if you don't cry again causing Rio to pout. Sadly, the car was then hit by a truck driven by Chironex, who was fleeing from the police. All four were hospitalized. Mr. Kastle, known as Mr. Kamishiro in the Japanese version, is a character in the Yu-Gi-Oh! ZEXAL whom was the father of Reginald and Rio Kastle. Mrs. Kastle, known as Mrs. Kamishiro in the Japanese version, is a character in the Yu-Gi-Oh! ZEXAL who was the mother of Reginald and Rio Kastle. Seen through Reginald's flashbacks, all that is known about Mr. Kastle is that he and the rest of his family were killed in a car accident when Reginald and Rio were children.[1](their deaths are not mentioned in the dub) Additionally, both siblings survived, however it is later revealed that the souls of Nash and Marin allowed Reginald and Rio's bodies to survive the incident, both of which becoming the "new" Reginald and Rio, respectively.[2] Seen through Reginald's flashbacks, all that is known about Mrs. Kastle is that she and the rest of her family were killed in a car accident when Reginald and Rio were children.[1] (their deaths are not mentioned in the dub) Additionally, both siblings survived, however it is later revealed that the souls of Nash and Marin allowed Reginald and Rio's bodies to survive the incident, both of which becoming the "new" Reginald and Rio, respectively.[2] Not much is known about Mr. and Mrs. Kastle. However, certain actions show their personality. Mr. Kastle has an empathetic side shown when by him not being dissapointed in reginald for ruining his cards when saving Rio from the suit of armor. Meanwhile Mrs. Kastle like any mother is motherly and caring as seen when she embraced Rio when she was crying after Reginald was injured. overall they both act like normal parents. Mrs. Kastle has grayish hair while remaining at a young looking appearance. she has light yellow eyes and two green pearl earrings. She wears a nice white dress and black heels. Mr. Kastle has tanner skin with dark pinkish hair and a dark pink mustache. he wears a yellow scarf and a black suit mainly to reference the family's wealth. In this time, Both kastle siblings are near 5-6 years old shown by their small height and innocent personalities. The family is rich