• Saruhiko is a dual flame user? However, it appears to have made him weaker than usual, thus his preference of sitting behind an office desk instead.
• Seri and Not!Shizuo having a link is interesting.
• I felt like my theory about Yata being a girl was swiftly shot down.
• Shiro lacking records is not surprising, since he doesn't have the PDA in the first place. Kukuri's reaction, on the other hand, may be either she's helping Shiro or she doesn't know Shiro at all, which brings us to
shmaster's theory.
And everything appears to be one big mystery case that rivals that of Hyouka or Gosick's cases.