Swoosh. Slash. Spill.
The blood painted the ground red as Aksai beheaded the demon lady after he was done interrogating her in his own way.
He found the answers he was looking for. There was no reason for him to keep the woman alive.
As for formatting her memories and giving her a new lease on life? Why should he do something as stupid as that? Firstly, he found out that the woman had done quite a lot of horrible things in the past. Although she had a bottom line, some things she did to gain power and fame were extreme even by the Wild Devil Lands' standards.
Secondly, Aksai didn't want to plant a time bomb for himself in the future by letting this enemy off the hook. The lady he had killed just now was a demonic cultivator. She was particularly skilled in getting what she wanted by any means possible.