The Enou Saika is the travel pass used by Kou Shuurei during her journey in Sa province. It allows her to pass through most checkpoints without being searched.
At first glance, the token only bears the Kou clan's emblem, but when surrounded by darkness it glows brightly. The glowing comes from the lumious "seven-colored" paint. Only those merchants under the direct control of the Kou clan have successfully manufactured this and possess it. It is a very special item. If a person carrying a token bearing the Enou Saika made with this paint should appear, the Merchant's Guild are to help that person regardless of what they may have to set aside to do so. This was the direct request from the Kou clan's leader as well as the proxy leader.