[Gets his hand on Excalibur and struggles to his feet again, on guard this time, although struggling to focus on the oni or on Stiles, hand shaking a little from where he presses it against the wound at his side again.]
I-- know that much. [He's little help here as it is, and all of this is much different -- and even though Stiles is managing to hit every single one of his insecurities in the span of mere minutes, he'll be damned if he lets it show beyond a few, barely-there flinches and a clenching of his jaw]
You're wrong. I won't let anything happen to the people here. Whatever you're planning, Stiles, it's-- I won't let you.