[Because they should only be so rude and hostile towards humans in public, Barricade adjusts the filters for her. Temper, temper, dear lady.]

What else is new? This is the first city I've seen on Earth that actually has walls to protect it, as well as an isolated location, so I'll give it that. But I'm sure you've noticed the defenses are awfully thin, what with Shibusen scrambling for that last generator.