Disclaimer: I will not focus on Art or Grammar, unless the latter would make the deck too difficult to understand.
One-Eyed Kazuo's a bit more direct than her counterpart in Masaru theme-wise. You know what you get, and I think her deal makes it relatively easy to throw her at players. Not to mention, it seems relatively smooth to play her and Masaru's views and drives both for them covering for each other, but also against each other once the inevitable friction becomes too much for dramatic duels. So yeah, I have to give a kudos for creating a good foundation for plot beats - I like an NPC character ready to risk everything. Similarly, her deck's gimmick is straightforward, and I suspect pretty interesting to observe in practice. Seppuku Sword especially seems like something that'd make for a memorable challenge to face.
On the downside, the deck does seem like it would rely on Masaru's presence to keep at it? This can become a problem as well.
I do have to check for a few minor things mechanics-wise, though. First, is the {Follow-up} on the second Plan to Win intended to be for another Power Card Move that turn? Second, is the first Plan to Win's ability meant to be used for a Samurai on the field or can you do it to the NPC's "Hand" as well?
Good job!