The Melponar triplets were the overarching villains in Ensign Brad Boimler's 2381 holonovel Crisis Point II: Paradoxus. They were identical Romulan triplet sisters who commanded a Valdore-type warbird. Boimler's script did not give them individual names, and referred to them simply as "Right", "Center", and "Left".
In the story, the Melponar triplets attack the USS Cerritos and steal the Chronogami. Though they are driven off by the USS Wayfarer under the command of Captain Bucephalus Dagger, they proceed to use the Chronogami to send their henchmen into the past to undermine Federation history.
After foiling their attempt to bomb the signing of the Federation Charter in 2161, the protagonists used the Chronogami to place the Romulans' own explosive device on the Melponar triplets' ship, destroying them. (LD: "Crisis Point 2: Paradoxus")