I don't know of a ninja called Senchi.
6 seconds sound clip from the Five Elements Ninjas movie soundboard.
You can hear this line at 01:00:20 in the Blu-ray version of the movie.
Quote context
[...]
- Before, you called me Mr. Xiao.
- That has nothing to do with it.
- I only knew an Ah Shun. I used to call her Nuisance.
- I don't know of a ninja called Senchi.
- I've turned into a big nuisance.
- Why be kind? Liang was kind to you, but you killed him.
- Liang really was a good man.
- But...
- It's my turn to be good. I saved you from them. They woulda killed you. Seems I did the wrong thing.
- You know, good men are not liked. Liang was a good man. And yet the man I like is you.
[...]