Ollie and Dann can both control others by sending out subtle psychic messages towards targeted individuals. The targeted people can then be controlled, made to do certain actions or even forced to believe something different. It doesn't matter what the person's original beliefs, desires or opinions would be. To all other onlookers, there would be no sign at all that the ability was used and nothing would appear weird or changed, but to the targeted person, reminders of the command would suddenly appear everywhere he or she looked. These would compel him or her to fulfil the demands and would be impossible to resist.