The R.R.W. Lleiset is a Tulwar-class Dreadnought under Commander Tiaru Jarok and the flagship of the Romulan Republic. She was put into service in 2409 to give the Romulan Republic a flagship on par with those of the Federation and the Klingon Empire.
According to Commander Jarok, the Romulan Republic player character was at one point considered for a post on the Lleiset, but it was decided that he/she would do more good as commander of his/her own ship.
- Commander Tiaru Jarok, Commanding Officer (Female Romulan)
- Subcommander Vaur Merol, Executive Officer (Male Romulan)
- Subcommander Xionel, Chief Engineer (Male Reman)
- Narrel, Science Officer (Male Deferi)
- Doctor Rhian Cratak, Chief Medical Officer (Female Romulan)
- Lieutenant Jhu Terel, Tactical Officer (Female Romulan)
- Lieutenant Gaius Selan, Intelligence and Chief Security Officer (Male Liberated Borg Romulan)
- Conn Officer (Female Romulan)
- “Romulan Imperial Minefield”: The Lleiset assists a group of players in defeating the I.R.W. Falcata.
- “Taris”: In 2409, the Lleiset meets Federation players in the Hobus System and transfers their Intelligence Officer, Lieutenant Gaius Selan, who assists the player in the mission to discover the truth behind the destruction of the Romulan homeworld.
- “Azure Nebula Rescue”: The Lleiset assists players in rescuing Romulan ships being held by the Tholian Assembly in the Azure Nebula.
- “Sphere of Influence”: The Lleiset assists the player in a battle against an Elachi fleet in the Jouret System.
- “A Step Between Stars”: The Lleiset under Commander Jarok assists Federation and Klingon players in the Jenolan Dyson Sphere against the Undine. After the immediate threat is over, Commander Jarok wants to claim the Jenolan Sphere for the Republic, provoking a verbal confrontation between the three powers.
- “Republic Day”: The player visits the bridge of the Lleiset and meets with her crew. The player then takes command of the ship for a brief weapons trial in orbit around New Romulus, testing out a new weapon against the Undine.
- “Surface Tension”: The Lleiset assists in repelling a massive Undine invasion of the Sol and Qo'noS Systems.
- “Know Your Enemies”: The Lleiset assists the player in defeating a Vaadwaur attack in the Nular System.
- “Capture the Flag”: The Lleiset is boarded by the Vaadwaur, who intend to destroy the ship by sabotaging her Singularity Core. The player must assist the crew of the Lleiset in repelling the boarders and saving the ship.
- “Alliances”: The Lleiset is present for a conference to discuss the formation of a coalition of Delta Quadrant species to counter the threat of the Vaadwaur.
- “What's Left Behind”: The Lleiset supports the player's ship in a raid on an Elachi subspace outpost. When Empress Sela is discovered onboard the station, she is arrested and beamed aboard the Lleiset for transport to Alliance Command.
- “Uneasy Allies”: The Lleiset is among the ships responding to the appearance of the Andromeda Dyson Sphere in the Iconia System.
- “Butterfly”: Along with the player's ship, the Lleiset accompanies the K.I.S. Annorax during its ill-fated temporal incursion to prevent the Federation from discovering Iconia in 2365.
- “Midnight”: The Lleiset participates in the final battle against the Iconians in Earth's orbit.
- “Scylla and Charybdis”: The Lleiset joins the player in the defence of Bajor against a Hur'q attack.
- “Storm Clouds Gather”: The Lleiset aids in the defense of Deep Space 9 and nearby civilian ships against another Hur'q incursion.
- “The Centre Cannot Hold”: The ship assists the player against emerging Elachi forces from a mycelial rift in the Terrh System. She later assists in the battle against House Mo'Kai and Klingon Rebel forces under J'Ula in the Qu'Vat System.
- “Trouble over Terrh”: The ship assists the player against emerging Elachi forces from a mycelial rift in the Terrh System.
- In the Rihannsu novel series, "lleiset" is Romulan ("Rihan") for "freedom". However, this contradicts Romulan naming conventions from the same series in that the Romulans do not name ships or people after abstract ideas for fear that the subject will be compelled to take on aspects of its name.
- Until the first release of “Republic Day” on April 3, 2014, the Lleiset appeared as a Falchion-class throughout the game. Since then, she is represented by a Tulwar-class vessel in all her appearances.
- The playable Lleiset in "Republic Day" has abilities the NPC vessel does not have, most notably the thalaron weapon.
- As of November 2014, the Lleiset appears to have acquired a Supercharged Ionized Plasma Beam, which previously was only available via the Ionized Particle Beam console from the playable Mogai Heavy Warbird Retrofit.
- Following the Victory is Life expansion, the Lleiset can be seen parked near Deep Space 9.
- U.S.S. Enterprise - The flagship of the United Federation of Planets
- I.K.S. Bortasqu' - The flagship of the Klingon Empire