Three Betazoid women carried by the USS Cerritos as carefree diplomats, who are in fact undercover intelligence officers investigating the mysterious attacks on ships across the quadrant.
Katrot, Cathiw and Dolorex appear in the Lower Decks episode Empathological Fallacies. The Cerritos is assigned to ferry the three Betazoid diplomats to Risa, and they spend the voyage drinking and partying with Captain Carol Freeman.
When the crew begin to lose control of their emotions, the Betazoids are blamed and accused of projecting their feelings. They drop their cover, reveal that they are intelligence officers looking into the unknown vessel that has been destroying ships, and seize the bridge when they find the Cerritos drifting towards the Romulan Neutral Zone.
The real cause is T'Lyn, whose suppressed emotions are being broadcast telepathically in a condition akin to Bendii syndrome. Once she and Beckett Mariner resolve it the stand-off ends, and the three agents resume their journey.