User blog comment:Kiadony/Chapter 58 raw/@comment-26135622-20150320221031/@comment-1746153-20150321095016

I don't think Izou's eyes mean anything. Ogre, Ibara and Sten all had weird eyes as well.

The real question is, did Izou have a Teigu after all? Since it's been stated that Kousetsu wasn't one.