I think Yuuka-san staying at that place on her own is definitely strange.

What if everyone other than Yuuka-san is the decoy?

I've known her for a long time, so I know her personality well.

No matter if she knows it's a trap; no matter if the way is fraught with peril;

attacking from the front at the greatest speed, greatest quantity, greatest strength of firepower,

that is what Yuuka-san does.

Please, beware not to let your eyes stray from the front...!

... Indeed.