Lifua was not the one who interrogated the captured woman. The elders had specialised personnel for the task. There were heart tools which were capable of extracting the memories of a person and that heart tool was used on the woman.
But the amount of information they were able to discover was quite limited. At first they found almost nothing as if this woman had not existed in this world for more than two days. But later on, with an extremely powerful heart tool capable of reading even the deeply hidden thoughts, they were finally able to get a few titbits of information.
The expert memory reader who had this heart tool capable of reading the deepest thoughts speculated that some kind of special heart tool had been used to erase her memory from a far distance. That tool had managed to erase most of the memories and it was almost perfect. But this man's own heart tool was just stronger and could find even the thoughts that the other heart tool could not reach.
