I must... I must get out of here.
The only thing on the man's mind was to get out of there as soon as possible. He disregarded everyone else, only thinking of the very mission he assigned to himself. Right now, he knew that that was the only thing he could do, that's why he set himself up to go through with the escape although it ate away at his guilt.
If any, it would've been much better if he had died. However, he didn't want his master's sacrifice to be in vain. She disregarded everyone else, and now, everyone else was killed along with her pointless sacrifice.
Filled with determination, the man continued his escape, with the only thought of getting to the Kazuichi Stronghold to ask for help. For one, he had no idea why she directed him to that place. He had heard a lot of good things about it, but he couldn't be so sure.