They maintained large libraries at each large Unicorn settlement, having a separate estate at Shiro Ide. Since the Unicorn Clan returned to Rokugan in 815 the Suio were first seen to be obsolete, as the clan was no longer in contact with gaijin nations. It became quickly apparent that the centuries the Unicorn had spent away from the Empire had separated them from their Rokugani cousins. The Suio had a new purpose: study Rokugani culture to facilitate the Unicorn's dealings with the other clans. The Suio did well and were rewarded with favored vassal status among Unicorn vassal families by Shinjo Hiroki, the Unicorn Clan Champion at the time.