I love the subtlety of the movement in this chapter.
Look at page 15... how Aleucia mirrors Beryl's movements, but not just the pose, the placement of the hands on the sword, firm but relaxed, one hand holding with two fingers but with clear firmness and flexibility to adapt, the other just slightly on the pommel to support and change.
One foot, positioned with a slight curve, just enough to allow a quick change in stance but with clear dexterity to not stumble, the other one positioned on the ball of the feet but aligned with the side muscle of the torso to create stability and power and allow quick follow-up with the front foot.
I am not saying this is how, or entirely is, in real life... but the delicate attention to the details, and how the motion is drawn on the next page, shows how much Satou-sensei takes care to make each motion have... breath, to tell a story.
Loved too, how much care and respect Rodius shows to a colleague in the art, most stories would make the teacher of a "rival" school to be caustic or show downright enmity, but he clearly values the experience this brings to him and his apprentices.