Odikinesis is the ability to manipulate feelings and emotions of war (such as hate, rage and fear). This is an ability possessed by Ares/Mars, Enyo, Bellona, and their immortal and demigod children.
Ares/Mars[]
Ares frequently utilizes odikinesis in order to start violent fights as often as he pleases. Hence, Percy always feels angry in his presence "as if I wanted to hit a wall or start a fight." He can instantly cure "battle jitters", as he did with Frank. Due to his odikinetic abilities, Ares is disliked by nearly all of his fellow Olympians.
Children of Ares/Mars[]
His children have this ability (though to a much lesser degree), notable examples being Deimos, Phobos, Clarisse La Rue, and Blackbeard. Due to unique violence and bloodthirsty, Blackbeard was one of the most feared pirates of all time and always used his odikinetic abilities while raiding ships. Clarisse is a hot-tempered bully who never has problems with inducing violent fights with other campers. A notable exception is Frank Zhang, child of Mars who was far more peaceful than any of his half-siblings.