Grandson is not from Masoukishin world....Shu built it himself in the Main world. Valshione of Ryune also come from the main world.... How did Shu get a familia birld, Chika, ? Familia normally comes with pilots from Masoukishin world like Kuro&Shiro of Masaki But Ryune did not have any familia even she stick with Masaki for long..... Chika really speaks too much for familia....