User blog comment:Jopjopjop/Volume 18 Spoilers/@comment-69.244.232.185-20141011030726/@comment-69.244.232.185-20141011150120

Vali is a honest person before and after leaving the KB.

Cao Cao did change a lot after his fight with Ise and staying in the realm of the dead, but he supposedly believes in the old ways (human fighting against devils/monsters or devils are evil.) and decides to put his vengeance against Ise way (which he stated) for now since they are occupied by a even greater threat than Cao Cao himself