Love the sweep & pointiness of the blade!! Simple & elegant. Steel choice & hardness level are attractive too. Very, very well done on that front.
I've only seen a couple of your blades (this one & the carry prototype at this point) so your work is new to me. They look to me like they'd be extremely useful kitchen knives and I could see buying them as such, even as they're being presented & promoted as something else.
Warning: personal opinion ahead.
The handle seems at odds with the blade to my eye, as if its execution (design too?) were hurried. Or as if it were somewhat cobbled together of disparate elements without an overarching vision for guidance or is still unfinished. My reference polestar for a kwaiken is those on traditional Japanese blades. So if your goal is something else, my apologies and I welcome enlightenment on your aim.
As noted, the blade is sleek & lovely in its swept simplicity. Contrast that with the conflicting bulbous lines, rather sharp transitions/edges, and long flat planes of the handle. Sorry, but the word chunky come to mind for the forepart of the handle, while the middle/back looks uncomfortably stick-like. But that leaves room & material for modifications if you choose to make them.
My eye wants to see more work & refinement put into the handle to raise it to the level of the blade. Current handle material suffices on a utilitarian scale and could be finished in a way to flow into the ricasso smoothly. But there are alternatives (both exotic woods & man-made materials) that can be acquired pretty cheaply and would be appropriate & upscale dressing for the kwaiken, which I think it deserves.
Design wise on the handle I'd like to see things like palm swell near the middle, faired in organic curves flowing into each other, ergo's that will facilitate the grip(s) you think this knife calls for, indexing geometry or finger groove (only a single one near handle front radiused into handle sides is a personal preference), and/or a general simplifying (design integration of constituent handle parts, radiusing of edges, & smoothing of transitions).
Okay, rant over. That's my $0.02 and it's worth every nickel you pay to get it.
</personal opinion>
Please keep working at your art & posting up your wares.
