User blog comment:Jopjopjop/Volume 19 Spoilers/@comment-1.53.124.174-20150712141105/@comment-24502975-20150712154316

Euclid wasn't anywhere near Kuou Town. Iirc Yaegaki was in a neighboring town outside Kuoh. Strada's a fucking monster, he gets a free pass wherever he wants.

It has nothing to do with overconfidence - if you knew anything about security, you'd know that it's never impenetrable. Someone will always be able to find a way in.

And holy shit, the comments about Yaegaki's death being anti climactic are annoying. He didn't serve any purpose other than to stir up chaos for Rizevim, did you expect Rizevim to let him live and potentially join [DxD] after that? [Penetrate] was also foreshadowed since late volume 17/early volume 18. And it wasn't even necessary except for surprise factor to catch him off-guard, considering he had Dragonification.