Does Obi-Wan Kenobi's new villain break a Star Wars naming rule? After The Mandalorian and The Book of Boba Fett, Disney+'s next live-action Star Wars sojourn comes via Obi-Wan Kenobi, and the highly-anticipated return of Ewan McGregor. Set several years after Revenge of the Sith when Luke Skywalker is a young child living with his aunt and uncle on Tatooine, Obi-Wan finds himself evading the Empire's dreaded Inquisitors. Carrying lightsabers and some degree of dark side Force powers, these villains are sent to hunt any Jedi who survived Order 66. As you can imagine, General Kenobi sits pretty high on their hit-list.
Obi-Wan Kenobi features two Inquisitors more prominently than the others. First, you've got the Grand Inquisitor, introduced by Star Wars Rebels. Occupying the highest rank of his order, the Grand Inquisitor defers directly to Darth Vader himself, who will also appear in Obi-Wan Kenobi, played by Hayden Christensen. Our second featured Inquisitor in Obi-Wan Kenobi is brand new to the franchise. Played by Moses Ingram (Jolene from The Queen's Gambit), Reva is shown in the Obi-Wan Kenobi trailer hunting Ewan McGregor across Tatooine and Daiyu - Star Wars' brand new dance club paradise planet.
Although Reva is undoubtedly an Inquisitor in Obi-Wan Kenobi, her name breaks rank. After the Grand Inquisitor, the order are named "Brother" or "Sister." For example, "Seventh Brother," "Second Sister," etc. Some of these characters can actually be spotted in the Obi-Wan Kenobi trailer, most notably the Fifth Brother, who's leading a crew of Stormtroopers on Daiyu. It's very unusual that an Empire Inquisitor would be referred to by an actual name like "Reva," which breaks with established franchise rules. According to official sources, Reva is actually the Third Sister.
From a behind-the-scenes perspective, it makes sense to give Moses Ingram's Inquisitor a proper name, rather than using her "Third Sister" moniker. Deviating from the usual naming pattern signifies her narrative importance, and elevates Reva above your standard Inquisitor, adding a more intense aura of threat to this debuting character. In-universe, however, why isn't Reva referred to as Third Sister in Obi-Wan Kenobi? Maybe the Disney+ series will begin to reveal more of Inquisitors' real names, fleshing out their backstories and personalities, and Reva is just the tip of that iceberg. Alas, this would defeat the object of the Empire using "Brother" and "Sister" to strip away their Inquisitors' former identities - an important step, since many are former Jedi.
Perhaps, then, Reva is a special case. If the Third Sister distinguished herself so greatly in hunting and capturing Jedi, the Grand Inquisitor or Darth Vader might've decreed that she could use her real name once again - a sign of respect for her loyal efforts. Reva would then rank somewhere between the Grand Inquisitor and the other Inquisitors, and that makes sense, given how the character is described as "ruthlessly ambitious." Reva ascending beyond the remit of a regular Inquisitor neatly explains why she's so desperate to catch Obi-Wan Kenobi too. The Empire shows its faith by restoring her name, and she's keen to return the favor by delivering the bearded head of Obi-Wan.
Heading into proper fan theory territory, there's a slim possibility (but a possibility nonetheless) that "Reva" is another given title... connected to Darth Revan. Has Reva chosen her new name in homage to this legendary Sith? Whatever explanation Obi-Wan Kenobi comes up with, calling Moses Ingram's villain "Reva" rather than "Third Sister" does need some explanation. Star Wars Rebels firmly established that the Empire's order of Inquisitors use "Brother" and "Sister," and Star Wars can't ignore why Reva is an exception to that rule.