Mika Grey was a human female archaeologist who possessed Force-sensitivity. Around the time of 31 ABY, she embarked on a mission to search the galaxy in pursuit of Sith artifacts, with the goal of securing them before the First Order could obtain them. Almost two years later, the archaeologist made her way to the planet Vargos 9 and encountered a squad of First Order Raiders who were also on the hunt for dark side artifacts. After she left the planet, the squad continued to follow Grey's movements. In 34 ABY, Grey journeyed to the planet Ashas Ree and unearthed a Sith temple located there. Having successfully raised the Sith temple, the treasure hunter tried to seize a Sith relic from the site, but she inadvertently triggered a trap, which led to her being confined in a chamber underground. Approximately two days later, the Resistance spy Kazuda Xiono, along with siblings Kel and Eila, and the astromech droid CB-23, picked up on Grey's calls for assistance and entered the temple in an attempt to help her.
When Xiono attempted to handle the Sith relic, he also ended up in the chamber where Grey was trapped. Kel, Eila, and CB-23 assisted the pair in escaping their predicament by activating certain Sith hieroglyphics just before the structure's mechanisms could crush them. Grey then placed the Sith relic inside her backpack. Subsequently, when Xiono inadvertently initiated the Sith temple's self-destruction sequence, Grey, along with her new companions, escaped from the collapsing temple. First Order Raiders, who had been monitoring Grey's location, confronted them outside, eventually capturing the majority of the group. The archaeologist then activated the Sith relic, and its resulting explosion killed the troopers. Following this, Grey accepted Kel and Eila's invitation to join them aboard the supertanker fuel depot known as Colossus.
On the Colossus, Grey started working as a fortune teller and prophet in the platform's marketplace. When the Warbird pirate named Leoz placed a curse on Xiono, the latter sought Grey's help to remove the supposed affliction. The fortune teller provided him with a wooden talisman to protect him from the curse's effects, explaining that its effectiveness was directly related to his belief in it. Encouraged by her words, Xiono overcame his fears about the curse and successfully assisted the Colossus's Ace Squadron in defending the platform against the Guavian Death Gang. Later that year, Grey aided in the defense of the Colossus when the First Order Star Destroyer Thunderer attacked the platform in the Barabesh system.

During the era of the New Republic, the Force-sensitive archaeologist and treasure hunter Mika Grey, a human female, operated during the reign of this government. At some point during her travels, she came into possession of a wooden talisman. Around 31 ABY, Grey began searching for Sith artifacts throughout the galaxy to prevent the relics from falling into the hands of the First Order, notably its eventual Supreme Leader, Kylo Ren. Almost two years later, while on the planet Vargos 9, Grey had her first encounter with a squad of First Order Raiders, who were elite First Order troopers also in search of dark side relics. After leaving the planet, she thought she had managed to shake off her pursuers. However, unbeknownst to Grey, the First Order Raiders continued to track her whereabouts.
In 34 ABY, Grey began a new quest for an ancient Sith relic that she believed was dangerous due to its potential to kill everything in its path. Having been searching for it for two and a half years, she made her way to the forested Outer Rim planet Ashas Ree. After landing her starship on the outskirts of the planet's trading outpost, she entered the settlement, finding it to be adjacent to a Temple of the Force that had in turn been built atop an ancient Sith temple. When the treasure hunter began excavating the Sith temple to raise its shrine upward, her efforts terrified the local villagers. Sensing the ripples of destructive dark side power emanating from the nearby structure, the locals fled into Ashas Ree's forests, leaving hastily scrawled warnings in their outpost to ward away travelers. The treasure hunter's excavation efforts proved successful, and she broke inside the structure.

While attempting to retrieve the relic from the temple's dusty crypt, Grey set off one of the totem's many traps and puzzles and became trapped in a chamber below the artifact's altar. She began pleading for help, remaining trapped in the chamber for almost two days. Eventually, the siblings Kel and Eila, the Resistance spy Kazuda Xiono, and the astromech droid CB-23 heard her cries when they entered the temple, and they followed the sound of her voice to try to help her. After the group became separated in the temple, Xiono and CB-23 entered the room holding the artifact Grey had been seeking, and the spy reached out to touch it while suffering disorientation from an electric shock trap. When Xiono's hand neared the object, despite Grey's warning to stay away, he set off one of the temple's traps and fell into the chamber housing the archaeologist.
After Xiono sent CB-23 away to bring Kel and Eila to help, Grey approached the spy and admonished him for trying to touch the artifact. The archaeologist's appearance scared the Resistance operative, and he backed away from her, eventually tripping and falling on his back. Grey picked up Xiono by his jacket and demanded to know his intentions, only releasing him after ascertaining that he was not working for the First Order. The treasure hunter then expounded on how she had excavated the temple and eventually became trapped inside. Grey continued to answer Xiono's questions, explaining how the planet's villagers had fled when she began her work on the world. Despite Grey's warnings for him to stay still, Xiono accidentally triggered a booby-trap device that activated a giant drill-like machine below them.

When the chamber started spinning, Xiono and Grey were thrown against the walls, and the resulting force immobilized them. As the trap's grinder moved closer to the pair, Eila, Kel, and CB-23 arrived, and with Grey's guidance, the two siblings pressed the two star-shaped Sith hieroglyphics that deactivated it. Although CB-23 let down a grappling cable for Xiono to help him out of the chamber, Grey leaped out of the pit on her own. She then retrieved the relic and stored it in her backpack, informing the others present that she intended to take it in order to keep it out of others' possession. Shortly afterward, Xiono pressed one of the temple's wall symbols and activated the structure's self-destruction sequence. The group rushed out of the crumbling temple together, narrowly escaping up several flights of stairs.

Upon reaching the temple's exit, the group discovered that First Order Raiders, led by the stormtrooper Raith, had arrived on the world in search of Grey. Upon seeing that the squad had taken Xiono's colleagues—the pilots Torra Doza and [Freya Fenris](/article/freya_fenris]—as prisoners, Grey suggested that they should return to her ship to escape the confrontation. However, the First Order destroyed her vessel moments later, leading Xiono to propose an alternate plan of rescuing his friends. Before they could do so, Grey left, and Xiono, Kel, Eila, and CB-23 were captured by the First Order Raiders and held in custody alongside Doza and Fenris.
Meanwhile, Grey climbed onto the temple's roof and taunted the troopers by brandishing the Sith relic she had acquired. When Raith demanded she surrender the artifact, she instead activated the relic and threw it toward the troopers and their captives, warning Xiono and his companions to flee into the temple. Moments afterward, the Sith relic unleashed waves of destructive energy, killing the First Order Raiders who had attempted to deactivate it.

After eliminating the First Order threat, Grey briefly bemoaned the destruction of the now-useless relic, as she had been searching for it for a long time. She then told Xiono and his companions that she needed to find a way off Ashas Ree since the First Order had destroyed her ship. Kaz and Eila invited Grey to join them aboard the Colossus—a supertanker fuel depot fleeing the First Order. Accepting the invitation, Grey conversed with Eila during their journey to the Colossus and told the young girl about the Force and about her own identity as neither a Jedi nor a Sith. As the archaeologist expounded on her perspective on the qualities of the Force, Xiono listened intently.

Later that year, Grey took on the roles of fortune teller and prophet in the Colossus's marketplace, where she ran a stall and charged each customer fifty credits for her services. The gorg merchant Bolza Grool became one of her clients and wished to know if he would survive the ongoing war in the galaxy. When Grey predicted that his future included tiny teeth gnawing on his insides, Grool interpreted it to mean that he was in danger from his gorgs. Despite the Klatooinian's offers to pay her an additional fee for more details about his future, she declined and collected payment from him.
After the Warbird pirate Leoz cast a supposed curse on Xiono, Grey became aware of his predicament and watched the pilot and his colleague, the mechanic Neeku Vozo, from her marketplace stall. Later, the Resistance operative visited her in order to remove the curse after Vozo had convinced him he needed her help. The fortune teller slowly eased Xiono's boot full of credits toward herself, tucking them closer to her as she counseled him that the effects of any curse largely depended on how much one believed in it. She gave Kaz a small wooden talisman to ward off bad luck and evil energies, explaining that she had acquired it on her travels.

When the Colossus's alarms began blaring due to a Guavian Death Gang attack, Xiono hastily left Grey's company and took the charm with him. Shortly afterward, Xiono accidentally dropped the talisman in a hangar prior to boarding his racer, the Fireball. After leading the platform's Ace Squadron to victory against the Guavians, the pilot learned from Vozo that he had dropped the charm before leaving the Colossus and realized Leoz had never cursed him. Recalling Grey's earlier advice, Xiono decided to give Grey's totem to the pirate and claimed that it was cursed, which made the pirate panic due to his superstitious beliefs. Xiono later thanked Grey for helping him, and, after he left, the amused fortune teller reflected on how superstitious the pirates on the Colossus were.

In 34 ABY, when the First Order Star Destroyer Thunderer pursued the Colossus to the Barabesh system, Captain Imanuel Doza convened the platform's inhabitants, including Grey, at the cantina known as Aunt Z's Tavern. He entreated those present to assist in rescuing three Colossus residents—Xiono, the mechanic Jarek Yeager, and the TIE pilot Tamara Ryvora—who were trapped onboard the Thunderer. After Xiono and Ryvora sent a holographic transmission broadcasted to those in the cantina begging them to flee before the First Order arrived, Grey and the others on the Colossus felt moved by their loyalty and decided to help them.
The fortune teller and several others got ready to engage a boarding party in one of the Colossus's marketplaces, and when the troopers arrived, she fired her blaster pistol at them before retreating alongside her colleagues behind a door. However, the First Order's stormtroopers pursued Grey and the station resident Jooks down a corridor. As the pair fled, Grool jumped in the pursuers' path to slow their pace and attacked them. Shortly afterward, pilots from the Ace and Jade Squadrons destroyed the Thunderer's engines, causing the vessel to explode and marking the Colossus's success in the entanglement. Grey celebrated their victory alongside the platform's other residents.
Grey was a woman with tan skin, white hair, and green eyes. She sported blue tattoos on her face and arms. By the time of her visit to Ashas Ree in 34 ABY, she possessed a well-muscled physique and was capable of executing leaps and running from First Order pursuers. Grey also had an aged appearance by that time, evidenced by a few wrinkles on her face. The archaeologist was a fearless individual willing to seek out dangerous Sith artifacts to keep them out of the hands of the First Order. Although she was pursued by First Order Raiders, Grey proved inventive in eluding them as she traveled the galaxy. The rugged archaeologist preferred to work alone, trusting in her own abilities to lead her to success. Despite the alluring power offered by the Sith relics she hunted, she cared little for the monetary benefit of turning them over to the First Order. Although she was neither a Jedi nor a Sith, Grey cared about the Force and held the opinion that it belonged to everyone instead of any specific person. Grey did not believe in curses being real and thought that their effect only reached as far as the cursed individual's belief in them. The archaeologist regarded the villagers on Ashas Ree as superstitious fools for fleeing after her excavation of the world's Sith temple.

When she first encountered Kazuda Xiono, Grey was cautious, suspecting that he might be working for the First Order, and she expressed her distrust of him. The pilot was intimidated by her intense and imposing presence, fearing that she might harm him. However, once Grey determined that he posed no threat, she simply found the Resistance spy's clumsiness irritating and disliked his talkative nature. Rather than allowing the First Order Raiders to seize a Sith relic from her, she chose to render it useless by activating it, resulting in the troopers' deaths. She enjoyed taunting the First Order Raiders before they died, taking pride in having evaded them up until that point.
While working as a fortune teller on the Colossus, Grey took advantage of her customers' superstitious fears by offering advice in exchange for credits. She helped Xiono deal with his fears about a pirate curse, providing him with a talisman to ward off evil in exchange for his credits. Later, when he realized that he had never been cursed, he thanked the fortune teller for helping him overcome his fears. When the First Order attacked the Colossus, Grey joined in the defense of the station against the invading troopers, working alongside other residents to repel the soldiers.

By the time of the New Republic, Grey was an experienced archaeologist and treasure hunter, which allowed her to explore worlds with ancient and dark histories. She was especially knowledgeable about dark side artifacts, including Sith relics and the sacred temples they resided in. The archaeologist was Force-sensitive, which allowed her to sense and seek out sites emanating the power of the Force, such as Ashas Ree's temple. Her skills helped her excavate the world's Sith temple, raise it, and break into it in order to locate an artifact. Grey's dark side knowledge helped save her from perishing in the temple, with her proving able to guide Kel and Eila into deactivating one of the temple's traps via interacting with Sith hieroglyphics.
The treasure hunter was also able to activate and drain the power from a Sith artifact, which killed the First Order Raiders threatening her and her companions. As a fortune teller on the Colossus, Grey proved skillful at manipulating people's fears and desires regarding their superstitious beliefs. By charging credits for her services to act as a prophet, she profited from Colossus residents seeking advice or solutions.

While hunting for Sith relics, Grey owned a starship she used to planet-hop across the galaxy. However, First Order Raiders destroyed the vessel on Ashas Ree. While working as a fortune teller in the Colossus's marketplace, Grey charged her customers fifty credits for her services and stored her payments near her workspace. At some point, she acquired a talisman that she later gave to Xiono aboard the Colossus, though he gave it to Leoz shortly afterward. During the platform's fight against the First Order in the Barabesh system, the fortune teller used a blaster pistol to fire at stormtroopers.
Grey wore a multicolored shirt trimmed in gold, gray pants, and white wrappings around her lower calves. She also put on a gray scarf, gray shoes with white soles, and a gold ring, and styled her hair with decorative clips and a brown hair tie. As part of her outfit, she sported a coral-colored anklet on one leg, several black ties on the other, gray earrings, and a gold nose piercing. Grey donned a brown side pouch attached to a belt and a light gray backpack that she used to carry the Sith relic on Ashas Ree and to hold her possessions on the Colossus. To complete her ensemble, the treasure hunter wore two armbands—one white and one gold—and donned several beaded bracelets in brown, coral, and white.

Mika Grey made her debut in "The Relic Raiders," which is the seventh installment of the second season of Star Wars Resistance, an animated television show. Before the episode was broadcast on November 17, 2019, Grey was seen, though not named, in a season preview that was distributed on August 14 of that same year. Her name was revealed in "The Relic Raiders," and she was voiced by the actress Tudi Roche. A conceptual drawing of the character was created by Lucasfilm Animation artist JP Balmet on March 10, 2018. An earlier iteration of the "The Relic Raiders" script had Grey explaining that the Sith Lord once owned the Sith relic she found on Ashas Ree. Aaron Pham, an artist at Lucasfilm Animation, designed a destroyed droid with the title "droidMikaDmg" on May 17, 2018.
Grey also made an appearance in "Kaz's Curse," which was the tenth episode of the second season of Star Wars Resistance, which was shown on December 8, 2019. An initial version of the episode's narrative featured the curse placed on Kazuda Xiono as being genuine, with Grey allowing him to believe it was just a superstition to make it easier for her to get rid of it. According to an article on StarWars.com, the talisman in "Kaz's Curse" had several potential origins, one of which was that Grey discovered the trinket on the planet Mimban, and another was that it was one of Eila's missing dolls.

Pablo Hidalgo of the Lucasfilm Story Group stated that Grey's character was conceived by imagining what Asajj Ventress—a member of the Nightsister coven of witches from the Outer Rim planet Dathomir who had previously been a Jedi Padawan, then a Sith apprentice, and later a bounty hunter—would have been like if she had lived to the time of the episode. Hidalgo stated that the character's name was a "sort of rhyming nod" to Nika Futterman, who provided the voice for Ventress in Star Wars: The Clone Wars, an animated television series. Brandon Auman, the main writer for Star Wars Resistance, revealed that a very early version of the "The Relic Raiders" story included a battle between an older Ventress and Kylo Ren on the Colossus (confrontation).
The script was ultimately changed, and Ventress was replaced with Grey, because Dave Filoni, the show's creator, believed that fans would be too focused on Ventress's presence due to her popularity as a character from The Clone Wars, which would detract from the other characters in the series. Filoni informed Auman during the series' production that Grey was a former Nightsister. Kristin Baver, the author, believed the archaeologist was similar to Kanata in that Grey didn't actively use the Force, but she still had a thorough understanding of it and respected it.

The character was supposed to be in another episode of Star Wars Resistance, but it was cut after being written because of budget issues. It would have shown that she and Maz Kanata, the Force-sensitive smuggler queen, were old friends who had worked together as pirates in the past.
The episode would have featured Kanata enlisting Grey's help to retrieve an ancient Jedi text for Rey, who needed it to learn about the Force, including the Force healing ability. After enlisting Xiono's help, the group would have traveled on a starship that was gradually being pulled into a star that housed the relic. Xiono, Grey, and Kanata would have attempted to obtain the artifact from the ship's vault, which was protected by several layers of traps, during the mission. The First Order Raiders would have returned to find the relic, but the two would have eventually obtained the text, which Kanata would later give to Rey.