Well, I finally finished maxing out every Master's Mastery and Bond level. Just in time for Rashid!
Earlier in the thread, when we were talking about whether your character's preternatural ability to copy styles was canon, or just a gameplay conceit, and it was said that none of the character seem to comment on it, so it's probably not real.
But after maxing out everyone's Bond, I can say that a bunch of the characters actually mention it as their bond gets higher. Luke calls you a "technique sponge", Manon calls you a "genius when it comes to mimicking the styles of others" and "you make stealing skills look easy", etc. So at the very least, your fighter copying abilities are an actual thing, and they seem unusual and noteworthy to them.