Warning: SPOILERS for Star Trek: Picard Season 2, Episode 3 - "Assimilation"
Elnor (Evan Evagora) died in Star Trek: Picard season 2, episode 3, but his exit (which may only be temporary) helps fix an issue with his character from Star Trek: Picard season 1. At the start of "Assimilation," the Magistrate (Jon Jon Briones) shoots Elnor with a phaser when he and his Confederation soldiers boarded La Sirena. The young Romulan dies from his injuries and is mourned by his surrogate parents, Jean-Luc Picard (Patrick Stewart) and Raffi Musiker (Michelle Hurd). Elnor's sudden death also means that the Romulan warrior nuns are currently no longer a factor in Star Trek: Picard season 2.
The Qowat Milat, along with the villainous Zhat Vash, are inventions of Star Trek: Picard season 1's showrunner, Michael Chabon. The Qowat Milat were, essentially, the opposite number to the Zhat Vash, which was an extremist faction of the Tal Shiar secret police. The sword-wielding Qowat Milat are different from traditional Romulans in that they practice "absolute candor" and freely express what they think. The Qowat Milat also only bind their swords to lost causes. Although the Qowat Milat are women, Elnor was adopted into their fold and trained as a warrior after he was orphaned during the Romulans' evacuation when their sun went supernova. Elnor and the Qowat Milat also befriended Jean-Luc Picard, who has known the young male Romulan ninja since he was a child. Overall, the Qowat Milat are part of changes Star Trek: Picard made to Romulan lore.
Before his death, Elnor already moved away from the Qowat Milat in Star Trek: Picard season 2. Indeed, when Star Trek: Picard season 2 began, Elnor was recognized as the first fully Romulan cadet at Starfleet Academy. Cadet Elnor was even stationed aboard the USS Excelsior with his guardian, Commander Raffi Musiker, when the Borg Queen (Annie Wersching) attacked the USS Stargazer and nearly assimilated an entire Starfleet armada. Elnor ended up joining his friends among Picard's motley crew when they were transplanted into the radically different Confederation reality by Q (John de Lancie). With all of the time-travel madness Picard is now facing in season 2, there is no onus to further explore Elnor as a member of the Qowat Milat. As intriguing a concept as the Qowat Milat is, they don't fit in Star Trek: Picard season 2's time travel story to prevent the dark future of the Confederation from ever happening.
Meanwhile, the Qowat Milat is actually being depicted better on Star Trek: Discovery. The sect of Romulan warrior nuns survive into the 32nd century and are part of the combined societies of Vulcans and Romulans who now share Ni'Var, the new name of the Vulcans' homeworld. Further, Gabrielle Burnham (Sonja Sohn), the mother of the USS Discovery's Captain Michael Burnham (Sonequa Martin-Green), is a member of the Qowat Milat. Though the Burnhams, more effective exploration of the rules and challenges of being a Qowat Milat has been shown on Star Trek: Discovery than their limited role in Star Trek: Picard has allowed, even though the concept originated on Picard.
It's hard to believe Elnor is permanently dead and it's worth hoping that the young Romulan will be resurrected when Picard and his friends set the timeline back to the proper Prime Universe of Star Trek. With Soji (Isa Briones) also missing from the Confederation's dark reality, losing Elnor as well seems very questionable because it eliminates Star Trek: Picard's youngest new characters. As for the Qowat Milat, the Romulan warrior nuns are an intriguing addition to Star Trek but they simply weren't handled in the best way in Star Trek: Picard compared to the Romulans' depiction in Star Trek: Discovery. If and when Elnor returns in Star Trek: Picard season 2, his best future will be as a Starfleet Officer, not as a member of the Qowat Milat.
Star Trek: Picard Season 2 streams Thursdays on Paramount+.