Rostnsthal is a non-playable character in Final Fantasy XIV. Originally known as Sthalmann Sthalmannsyn, he was the Commodore of the Knights of the Barracudas circa 1562 of the Sixth Astral Era, until his actions led to him being disgraced and changing his name. He reappears in Final Fantasy XIV: Heavensward as a marksmanship instructor in the Machinist job quests.
Final Fantasy XIV legacy
In 1562 of the Sixth Astral Era, a mysterious islet called Seal Rock suddenly appeared in the Rhotano Sea, amid a flurry of speculation in the thallocracy that it was the mythical Swallowtail Roam. Sthallman was the Commodore of the Knights of the Barracudas with ambitions of taking the admiral's seat. Sthallman had recruited allies promising them power when he becomes admiral of the city-state.
One of them was Emerick of the Kraken's Arms, who had ties to the Serpent Reavers. Another was Merodaulyn, one of the few male members of the Sanguine Sirens, who was placed in the 5th Levy Seal Rock Provisional Unit. The plan was to have Emerick hand a navy sailing chart to the Serpent Reaver Travanchet, who would pass it to the Sahagin. Merodaulyn would ensure the 5th Levy would fail in the inevitable attack, allowing Carvallain and his Kraken's Arms to land on the isle itself. Under Sthallman's orders, Emerick procured a curious horn-shaped artifact.
Carvellain turned in Emerick to Sthalmann after learning his role in the Sahagin attack, who took him in his protection. With other pirates seeking blood, Sthalmann tricked the Sanguine Sirens into attacking Mealvaan's Gate, and used the fallout to confiscate another artifact from the Seal Rock: a stone tablet with inscriptions in Rhotano Bloodcant.
Merodaulyn later freed Emerick, and the two planned an escape. Just as Y'shtola warned them that "the shadoweaters" were after the artifacts and respected they turn them over, Travanchet revealed his true nature as one of the aforementioned shadoweaters by attacking their ship. Two other Barracuda warships, themselves keeping tabs on Y'shtola as per Sthalmann's orders, tried to attack Trevanchet's vessels. The standoff was interrupted by a sea serpent that emerged from the water, damaging the ships with a wave.
The tablet was lost at sea, and with Emerick and Merodaulyn escaping Sthalmann lost an opportunity to dismantle two of the largest pirate gangs in Limsa Lominsa. He later orchestrated a plan to to assassinate the then admiral, and went to Gods' Grip in hopes of activating the power of the horn. He was confronted by Y'shtola, who demanded he hand it over to Sharlayan. Undeterred, he threatened to kill her if she didn't tell him how to use the horn. The Warrior of Light would witness this scene in an Echo vision ten years later, who saw Emerick's memories. The horn began glowing and a starshower erupted in the sky, with Trevanchet appearing from a nearby meteorite impact. He appeared behind Sthalmann and seized the horn, declaring that "power as this does not belong in the hands of your kind".
Since then, Sthalmann was disgraced for his plot, and became a drunken pirate captain of a crew of one, and changed his name to Rostnsthal. His new named reflected his tarnished reputation, as in the Roegadyn language, his former name of Sthalmann meant "Steel Man" while Rostnsthal translates to "Rusty Steel". His former second-in-command, Reyner, become the new Commodore, a position he retains to present day. The chair of admiral would eventually pass to Merlwyb Bloefhiswyn.
Five years after the Umbral Calamity, Rostnsthal was hired by Stephanivien as a marksmanship instructor at Skysteel Manufactory. He trained House Haillenarte's maidservant Joye and other volunteers in firearms. Just as the Warrior of Light arrives to sign-up as a machinist, Rostnsthal resigned his post and left for Camp Overlook. After some pleading by Stephanivien, Rostnsthal reluctantly agrees to test the adventurer's worth, and sets up an impromptu training course in Outer La Noscea. Satisfied with the Warrior of Light's potential, he agrees to return to the manufactory.
Throughout the questline, he discovers suspicious individuals attempting to harass or sabotage the manufactory. He suspects his own past reputation may be to blame, though Tedalgrinche shows to be mostly focused on discrediting Stephanivien. Rostnsthal otherwise does not participate in the manufactory's battles, typically just giving advice as per his contract.
In the MCH58 quest "Taking the Fall" Rostnsthal tries to turn himself in on the insurrection charges levied against the manufactory, against Stephanivien's wishes. After getting an essential weapon upgrade ready, he and the Warrior of Light to try to talk Rostnsthal out of it in the quest "Rusted Steel". He calms down, and confesses to his treacherous past deeds and his regret over betraying his subordinates. He asks to aid his students in the upcoming trial by combat against Veri Seren to atone for his actions as commodore.
Once Veri Seren is slain and the Skysteel Manufactory is exonerated from Tedalgrinche's charges, Rostnsthal takes his leave, nominating Joye as master marksman.
Rostnsthal is a seawolf Roegadyn with greenish skin brown hair and brown eyes. He wears a buccaneer's tricorne with an eyepatch and wears an open red shirt and longboots.
In the Roegadyn language, Rostnsthal translates to "Rusty Steel". Sthalmann Sthalmannsyn translates to "Steel Man, son of Steel Man".