Psi-Ops, or Psionic, is the ultimate diplomatic unit. In addition to the ability to <l:6,36>establish embassies<e> and <l:6,55>investigate cities<e>, she possesses a number of useful counterintelligence features: she sees all types of units, has great vision range, and is a <l:6,120>stealth unit<e> (Commando type) herself. Aside from purely innocent actions, she can induce mass hypnosis in an enemy city, which decreases Happiness for a period of time (this is represented by the <l:6,57>Advertising<e> special attack).