Sion Saiguuji

An upperclassman at Seitokoh Academy who appears in the diece game as the bishop piece acting as Kazukis guide. He is very quiet and very obedient though he actually doesnt like being ordered by Kazuki. He might be the King since in the previous game with Gara as they share the same info with Naruse amp Haruki. They two have the same face and Sion is much calmer which is similar to Haruki. Gara takes the place of Naruse. Source: Wikipedia