In truth, Izroth knew that Zanna was not a malicious person at heart. He was merely curious as to how she casually resisted not only his Soul Pressure but also Niflheim's Demoralized Spirit. Was her willpower really that strong? Or, could it be that she possessed a unique skill that allowed her to disregard them?
Although Izroth's last question was a legitimate one, his previous harsh behavior towards Zanna was to find an answer to this question. After all, with her personality, there was no chance she would just come out and say it willingly.
Nevertheless, regardless of how they crossed paths due to a misunderstanding, they were still on the same side of the war. Not to mention, it may have taken some coercing, but they did help Izroth out—and he always repaid kindness tenfold.
'I was going to wait until we reach the camp, but I suppose I can move it a bit ahead of schedule.'