If someone suddenly come out of corner then throw something to you,won't you evade by instinct? Nope!
And more of that even she look like this ,she is military personnel after all.
The point isn't that she evaded, but that she evaded an active duty shipgirl who was throwing beans at her seriously without any apparent effort. And succeeded against someone who usually can carry a radar.
Edit: and while ambushed she successfully evaded with a simple lean to the right. She did it well enough to arouse Yuudachi's hunter mode.
I remember her having a total of 10 dan(s) of black belts in various martial arts......
Maybe it's 'cos of that?
Being trained in kendo and martial arts doesn't make you an automatic projectile dodging machine. Especially against an active duty destroyer.
Demons, out-poooooooi!!Waaah!?Y-Yuudachi!?Throwing out of nowhere is too dangerous so don't do it, you understand?Destroyer SwitchI'm gonna get you for sure-poi!...Huh? Yuudachi?S-Something's wrong?The Admiral...is that strong-poi?She dodged themwith such ease...Wait, Yuudachi!
These documents will...!I won't wait-pooooi!