Even the dual samurai swordsman was slightly taken aback as soon as Kahn called him 'Sensei'.
It was the first time Kahn hadn't even addressed him as anything else other than an Instructor up until this point. But out of nowhere, Kahn calling him his Master even befuddled the samurai saint.
In a way, it was like Kahn finally accepting his teachings as a proper disciple, not as someone forced to learn from him because of a prior arrangement between them out of necessity.
Now, even Miyamoto Musashi showed an expression of contentment and pride.
[This brat… I'm not proud of his achievements because he's from Earth just like me.
But even among many generations of my descendants I've taught before after they proved their worth… He was leagues ahead.
They were bound to the versions of reality and their perspective of our world. It was always one of the biggest hurdles that stopped their growth.