First, the definition of ranks.

It's a measure to visualize the combat capabilities and other parameters of shipgirls.

It's determined by five elements including firearms, CQC, willpower, courage and insanity.

"insanity"? What the hell is insanity?

Rank A means "excels at most aspects, plus at least one extraordinariness".

Rank B means "good at most aspects".

Rank C is "mostly above average".

And Rank D is "meets minimum operational requirements".

By the way, a rank D doesn't mean she's just a weakling.

Like I said, the focus here is operational capabilities. Even Ushio is pretty strong compared to how she looks, you know?

The strongest Rank D

Yeah, she just lacks self-control.

※ Refer to S13