Burned through the last few stages with Kachi. Unlike my first run with Isa, I was able to do this without continuing, now that I know how to fend for myself against Commander Deko's final attack. My reward? A mode where I can switch back and forth between Isa and Kachi at any time. I may find myself using Kachi a lot more, because I find her lock-on charge shots easier to handle, even if her basic lock-on shots aren't (note to self: Isa for power, Kachi for technique).