Ahnciel slowly crossed his arms as the girl proceeded to tell them nothing other than how it was rude not to introduce themselves. This was an odd assertion coming from someone who may very well spend their time staring at strangers on a regular basis for all the knight knew, but they figured they may as well play along. Some bemused extant notion quickly grew suspicious of the girl who Ahnciel unfairly judged without knowing anything about them, suspecting this whole diversion to be a sort of aim at the contents of their pockets. Wouldn't they be disappointed.

[color=8882be]"I am Paladin Ahnciel Kassadin ouf Ispar ehn yes, as you somehow already know, zehr vahz quite recently a grizzly murder at zeht inn...one vhich I haf taken upon myself to investigate,"[/color] Ahnciel flatly explained, embellishing the claim of being a paladin, though they were simply trying out titles to see which one stuck, and with the emphasis and resolved chirp of the word so comfortably rolling off the tongue, they were almost convinced, themselves, of such a claim. [color=8882be]"Zehr vahz a peculiar scrawlink of zee verd 'Agartha' outside ouf my room ehn eit vahz my intention to investigate eit's significance"[/color] Ahnciel continued, laying out their hand as they lifted their head enough for the dark grim of the rainy day's hazy sunlight to catch the shine of seriousness in their eyes.

[color=8882be]"A man's innocence may require my haste, ehn 'maybes' vill hardly suffice,"[/color] A coldness in their voice hinted to the sharp reality of Ahnciel's actual interest, not even bothering to look behind themselves. [color=8882be]"Paerdon, my sternness iz hardly becomink, but you vill haf to understand me vehn I say zeht I haf found myself to be quite busy, today,"[/color] Ahnciel sighs after a moment, lowering their head to the toll of the bells signifying half of the day having came and went.

It was not entirely that Ahnciel did not pick up on the cue, but crushing paranoia played the scene out in usually one of two ways. In the books, the hero turns around just in time to be clobbered by an astonishingly quiet foe. Alternatively, turning around gives the roguish observer just enough time to make a break for it, getting a head start absconding with the information the hero was intending to pry from them.
However, Ahnciel imagined themselves bafflingly clever by calling the girl's bluff as well as at least not seeming so dense by turning around to provide an incoming fist or club the luxury of a confused, dumpy expression.

Instead, Ahnciel reached up to tip their hood back down, offering a [color=8882be]"Stay warm, staring stranger"[/color] before turning on their heels to walk back in the direction they came. Ideally, this would be the point where the girl would try to get his attention to aid in the vindication of a knight's honor or disappear like their types do in the books.
At the absolute least, Ahnciel would look like a total badass for about as long as it would take for the cheapshot to connect.