The T-800 tracks down Kenshi. For the third intro I recommend his default but for the rest pick whatever you like best.(Honestly Terminator has the best intro animations no cap)
Terminator: Your sword give it to me.
Kenshi: Why is everyone so interested in Sento?
Terminator: Skynet must examine it.
Kenshi: In this realm, there is actual magic.
Terminator: Magic is just unexplained science.
Kenshi: It's more than just that.
Terminator: Are you Takahashi Kenshi?
Kenshi: That would be me.
Terminator: You have been selected for termination.
Kenshi: I can't read your thoughts.
Terminator: That is because I am not human.
Kenshi: Then this will be a lot harder than I thought.
Terminator: My files on telekinesis are incomplete.
Kenshi: Anyway I can help?
Terminator: With your termination.
Kenshi: This isn't just another sword.
Terminator: I have files on every weapon known to man.
Kenshi: Sento is quite different than the rest.
I envision skynet viewing Kenshi and his son as threats because he can tell right away when a Terminator is among them. While the lore doesn't imply Sento is made of anything special it does have special properties that no doubt skynet would be interested.