"Yeah." Dean's already scowling at said windows, his sense of not-liking-this growing by the minute. It's true that Integra doesn't keep everyone on a tight leash, and it's true that the nature of their work means sometimes they just aren't around--but they are eventually. They may be a lot of other things but for the most part, Hellsing agents are responsible, loyal, would follow Integra's orders.

The ones who don't wash out, that is. The ones who cut it, who belong.

Mabel had struck Dean as one of those. And for her not to follow a simple order like check in was worrying enough, without the continued silence from her end, without her CiD still being active, and without this.

"I can't tell if it's to keep something out--or in." Either way he's worried now, enough to head straight up there, and the look he gives Integra makes that plain.