Corrin was supposedly born to the Hoshidan royal family as the child of Mikoto and Hoshido's king Sumeragi. As a result, they are the younger half sibling of Ryoma and Hinoka and the older half sibling of Takumi and Sakura, whom are instead Sumeragi's children with his first wife Ikona. They were kidnapped as a young child and raised by the royal family of the neighboring kingdom of Nohr, gaining new siblings in the form of Xander, Camilla, Leo, and Elise.