Panels 1 and 3: Not sure this point is 100% clear in this page—another example of problematic daily webcomic serialization, as this easier to follow if read immediately after the previous page—but Ninjette is shedding the masked disguise camouflaging her as Yukiko Ayakami.
Panel 3: A rigorously photoreferenced sword-wielding pose for Ninjette, here. Two-handed katana poses are especially tricky to draw, as getting that g-d support hand and arm correct can be maddeningly difficult. (Along the same lines, single-handed pistol poses are much easier to depict than two-handed rifle poses.)
Panel 4: I quite like the three different elements—two close-ups of each character combined with a “two-shot” of both of ’em—combined in this single panel. Nicely done, Decade-Ago Me!
Today’s Patreon update: Open slot in the weekly schedule today! Not sure what I’ll be posting, but something will go up today. I’ve been posting every weekday (sometimes multiple times per day) on this Patreon for over a year, so why stop now?