I don't have many units invested from Binding Blade. So when Brave Roy and Brunnya kept dying, I let Echidna take matters into her own hands.
Huge Fan+ and Rouse Spd/Def 3 are great for solo'ing, providing nice stat boosts and faster special charge on foe's attacks for Aether. While this isn't as good as a breath or flashing blade, it frees up the A slot for... Kestrel Stance 3. Lol. It was mostly a value fodder from Say'ri alongside Close Call 3, but hey it works to prevent special charging when attacking this thorny Echidna.
This build is so dumb but it worked. Enjoy the video!