Well, the vampires hadn't come yet. He hadn't needed to sharpen his weapon yet.

That makes me long for a Shiki fighting game, complete with those strange fighting game story reasons for each character to be battling people they're otherwise allies with.

Egad. And the little brother is supposed to represent Seishin's nice, public facade... look out, Ozaki. With things like that, people might start writing Seishin as capable of semeing.