User blog comment:IamJakuhoRaikoben/Chapter 441: Caracole Island, Review./@comment-967403-20150627043420/@comment-7418318-20150627170810

For long-lasting manipulations you're right, but I was more thinkng about short-term use direcly on the battlefield. Even a handful of enemy soldiers switching sides for just one minute could already wreak havoc in the enemy formation and ruin their leader's battle-plan if done right.

Regarding the suicide I suppose it would depend on the individual. But if he can make someone believe he did something so despicable that they can no longer live with themselves, it could work. At least in theory.

For example if you take a Samurai, he could make him believe that he committed an act that destroyed all his honour. A "true" Samurai would then commit seppuko to regain the lost honour.

Or he could make someone believe that his death would buy the survival of his family members.

Of course, as you said, this would require either detailed knowledge about the personality and circumstance of the person, or the ability to read minds.... which brings me to Warren. Warren can read minds for sure, so they would make a great team for infiltration.