Meet the Full Companions Cast of The Expanse: Osiris Reborn Ahead of Its Spring 2027 Launch

Owlcat Games used the Xbox Partner Preview Showcase to confirm that The Expanse: Osiris Reborn is targeting Spring 2027 on PC, PlayStation 5, and Xbox Series X|S, with day one availability on Xbox Game Pass Ultimate. Owlcat also confirmed that a Closed Beta begins on April 22, 2026, and access is tied to the Miller’s Pack or Collector’s Edition Founders through the game’s official site.

That timing gives the reveal of the full companion roster even more weight. In an exclusive feature from PC Gamer, the full main crew was outlined, showing that Owlcat is leaning hard into one of the strongest traditions of story driven squad RPGs: a party made up of sharply defined personalities with specific combat roles, personal agendas, and side story potential. The studio has already made it clear that companions are meant to be central to the experience, not just optional support units.

J, Executive Officer

The first and most unusual companion is J, the player character’s identical twin and Executive Officer. Because J mirrors your character creation choices, this companion is the most flexible in presentation, but not in personality. Owlcat describes J as impulsive, loyal, and very much their own person, which should make the sibling dynamic one of the more important emotional anchors in the game. J’s listed Exploit is Precision.

Teo, Doctor

Next is Teo, the team’s doctor and one of the louder personalities on the ship. He is described as a boisterous combat medic who lost his license back on Earth, yet still operates as a highly dangerous frontline presence thanks to armor and experimental stimulants. His Exploit is Malfunction, which suggests he will be more than a passive healer and may instead function as an aggressive disruption unit in battle.

Michael, Gunner

Michael fills the heavy gunner role and looks positioned to be one of the more traditional combat bruisers in the cast. After becoming disillusioned with both the UN military and private security work, he turned to mercenary life. PC Gamer describes him as principled and marked by personal tragedy, but still more than willing to throw himself straight into danger with a shield and shoulder mounted autocannon. His Exploit is Demolition.

Zafar, Mechanical Engineer

Then there is Zafar, the crew’s mechanical engineer, who appears to bring a calmer and more introspective energy to the team. He is described as careful with words and unexpectedly poetic, while in combat he pressures enemies with deployable turrets and EMF devices that disable equipment and create openings. Like Teo, Zafar uses the Malfunction Exploit, which may make him a strong tactical control option depending on encounter design.

Regina, Liason Officer

Regina serves as the liaison officer and appears to be one of the more enigmatic members of the group. She operates as a sniper, scout, and infiltration specialist, and PC Gamer notes that her guarded personality makes it difficult to understand her real past or long term motives. Even so, she sees the protagonist as a valuable ally in whatever mission is driving her. Regina’s Exploit is Precision, reinforcing her role as a more exact and surgical battlefield asset.

Aleesha, Electronic Warfare Specialist

For players who like the classic hacker archetype, Aleesha looks set to fill that slot with plenty of attitude. Owlcat’s upcoming RPG gives her the role of Electronic Warfare Specialist, and she is described as a former corporate figure who now pursues difficult problems and impossible enigmas simply to challenge herself. In combat, she uses drones and enemy system subversion, and her Exploit is Cyber attack, which should make her especially important in a game universe built around technology, station systems, and layered tactical encounters.

Polly, Shipgirl

Rounding out the crew is Polly, described as the shipgirl of the team and an optimistic young Belter determined to prove herself. In battle, she seems designed as a flexible support fighter, durable enough to absorb pressure but mobile enough to maintain steady mid range fire with a submachine gun. Her Exploit is Demolition, which gives her a combat role that sounds more active and aggressive than her upbeat personality might initially suggest.

The broader design philosophy here is just as important as the individual cast members. Owlcat has said that while players can only bring 2 companions on foot, the rest of the crew will still contribute from the ship in meaningful ways, rather than simply disappearing when not selected. That is a smart structural move because it keeps the whole cast relevant and should help the ship feel like a functioning team rather than a bench of inactive party members. Combined with personal stories and side missions, it gives The Expanse: Osiris Reborn a stronger ensemble identity, which is exactly what fans of character driven science fiction RPGs will want to see.

Players interested in getting in early can visit the official site for the Miller’s Pack and Collector’s Edition. As of now, Owlcat has confirmed the Spring 2027 launch window, but not a specific final release date.

Which companion are you most interested in bringing on missions first, the mysterious Regina, the hacker Aleesha, or the twin wildcard J?