Panel 2: Despite the owner’s supranym, this Japanese sword belonging to poor Captain Katana isn’t a proper katana as such. Rather, it would be considered an  ohdachi (great/large sword) or no-dachi (field sword), which was historically carried on the owner’s back as ol’ CK was doing with this oversized blade. (I'd include a Wiki link, here, but this commentary's formatting apparently balks at including an "o" with a macron over it for ohdachi's more proper romanization.)

Very tempted to weigh in at exhaustive length about my fellow geeks nitpicking the theoretically flawed trope of the big ol’ sword carried sheathed over the back, because this makes the sword “impossible” to be drawn quickly. In fact, just deleted a quite lengthy paragraph ranting about this matter; really, I think we're all better off for this discretion on my part.

Note that Emp goes the extra mile with Ninjette's real name in this panel, given that she presents in the proper Japanese "family name first" order and includes the honorific "san." Would this be considered creeping "weeaboo-ism?"

Note also that Ninjette would, in all likelihood, use varying forms of shuriken designs for her nail art, but I've never bothered to show different patterns, given that we can barely see her nails very clearly in most shots.

-AW