They are masked. You haven't seen any yet, but they wear Oni masks like their boss (http://fc04.deviantart.net/fs71/i/2011/345/c/a/daimyo_by_twosull-d4ivdc4.png) except it covers the whole face. (http://farm4.static.flickr.com/3551/5769329652_3796c28db0.jpg) :P<br/><br/>The Mibu Clan would, I presume, be wary of letting Tashi go. Maybe as something of a double agent, since the Guards are the closest people to the Daimyo. That being said, the Daimyo would probably see Tashi in the same way- hoping to sway him over to his side. :P