This means Yamashiro has gotten lax after becoming a ship-girl then.
The kids not knowing how she was compared to the Oni and still won is a definite proof of that. lol

I prefer a laid back and melancholic Yamashiro, thank you. We have enough high-strung shipgirls to wear down our nerves already.

After seeing Fusou stabbed in the side, 'course she'd go unbound...

... until WeeVee and the girls who all have axes to grind plastered her to high hell.