I don't know about scary. She's just got a ton of hours in the game is all.
Some spent like years in such games without learning the direction they should hide when shot though. And such people are pretty much everywhere so yeah, Inazuma is scary.
Pyah!Onee-chan was shot in the left side of her head... That means the shot must have came from somewhere between the north (N) and north-east (NE).
Furthermore, there was a very slight delay after bullet impact before hearing the gun's report, nodesu!Judging by the report, the rifle used for the sniping
was a "Kar98k" sniper rifle.
...and by factoring in muzzle velocity and the time taken for the shot to land...
