Wonder of U is a sentient Stand that is, unlike most Stands in the series, considerably expressive and holds a calm yet threatening demeanor. It's quite confident in its abilities, stating that nothing can approach nor hurt it. The Stand repeatedly goads its enemies into pursuing and triggering its ability, through mockery or threats. Wonder of U's primary ability allows it to manipulate a "natural law of calamity", which is a form of negative energy independent from the Stand.