Matsumushi is a very young little girl that seems to have exceedingly good eyesight.She is meant to be quotthe eyes of Seimei while Seimei is meant to be quother earsquot. Matsumushi seems hold a large amount of various medicine with her such as in the case when she handed medicine to Seimei when they were in quick need of healing the Capitals emperor. Because Matsumushi can not say a single word it is not known if she follows Seimei through affection or through configured loyalty set by Seimei. Either way Matsumushi seems to follow Seimei to any area and is occasionally seen as Seimeis second half.