Not much is known of Rouge's origins or past, though at some point she gained an obsession with jewels and became a treasure hunter. She also joined the Guardian Units of Nations as an undercover agent, and was paid for her services with gems and other riches. She gained possession of the blue Chaos Emerald at some point.
Sonic Adventure 2
At some point, Rouge learned of the Master Emerald and went after it, hoping to steal it from Knuckles the Echidna. She was seen arguing with Knuckles over it as she tried to convince him to "just let it go". Their argument was interrupted when the notorious Dr. Eggman, whom Rouge had heard of but never seen, arrived to take the Emerald for himself—which didn't go as planned, as Knuckles jumped up and smashed it. This prompted both Knuckles and Rouge to find all of the shards before the other did. However, just prior to beginning her search, Rouge apparently placed a tracker on the Eggmobile, which enabled her to later locate his pyramid base.
After finding three Emerald shards in Dry Lagoon, Rouge headed for the Egg Quarters, where she sent a message to the President's secretary through some sort of device apparently concealed in her glove. Finding three keys to enter Eggman's computer room, she discovers his space transporter, which is set to the Space Colony ARK Rouge had heard about. Using the machine, she heads for the central control room of the ARK. When she arrives, she strikes a deal with the Doctor and Shadow the Hedgehog: if he gives her his Emerald detector to the Master Emerald shards, then she would give him the blue Chaos Emerald she had found and would help him obtain the others, three of which she knew their locations. Around this time, she begins to investigate the Ultimate Lifeform and Project Shadow.
On Prison Island, Rouge steals three of the Emeralds after breaking into Security Hall. However, a guard robot appears and the vault is sealed, leaving her trapped in the building as Eggman's bomb is about to go off. Fortunately, she manages to destroy the robot, and is saved just in time by Shadow, who used Chaos Control. Back on the ARK, they threaten the world with the Eclipse Cannon, giving the President twenty-four hours to surrender the United Federation to the Eggman Empire, or else they would destroy the country.
Rouge was later supposed to try and guard the ARK from the intruders (Sonic the Hedgehog, Amy Rose, Miles "Tails" Prower and Knuckles) after Eggman failed to stop them (and ended up having to get out of the mess he got himself into) but instead started snooping around about the Ultimate Lifeform for the President. Later she discovered that Knuckles' stash of the Master Emerald Shards had accidentally been jettisoned into space, and used the opportunity to try to complete the Master Emerald. However, shortly after finding them, she encountered Knuckles at a Space Structure Planetoid and dueled with him for the Emerald Shards. However, her recklessness gets the better of her and she nearly falls into a pit of lava, where she is saved by Knuckles. They have an intimate moment before Rouge pulls her hand away from him and offers some bashful remarks. In the end, she gives him the Emerald Shards, claiming that "they stink like echidnas do", and takes off.
She continues to assist Shadow and Eggman, until she is revealed by Shadow to be a secret agent working for G.U.N., who also stops Rouge from taking the Emeralds from the Eclipse Cannon shortly after overhearing her plans. However, Eggman, while attempting to activate the Eclipse Cannon, unknowingly activates a crash sequence that was secretly programmed into the ARK's main computer. Rouge comes to Sonic and Knuckles to tell them the grave news after learning what was going to happen from the President (although Knuckles initially thought she was attempting to regain the Master Emerald when she arrived). Rouge cheers Sonic and Shadow on during the final battle to save the earth from the Biolizard, and is given Shadow's inhibitor ring by Sonic after his supposed death. She is seen telling Knuckles that she is going to change her treasure-hunting ways; a promise she doesn't sustain.
In Sonic Heroes, Rouge is the flight member (and presumptive captain) of Team Dark, as the player can have the ability to fly when they play as her. She releases the unconscious Shadow from his stasis pod, and accidentally activates E-123 Omega, who attempts to destroy all of Eggman's robots/androids, including Shadow, who Omega assumes is a robot android. Rouge stops Shadow and E-123 Omega from fighting, suggesting that they work together as a team to find Eggman. She wears a different outfit than in Sonic Adventure 2, sporting a more futuristic pink-and-purple design with the heart motif on her belt rather than her chest. At the windy city, she also accuses Team Chaotix of trying to take Eggman's treasure themselves before their battle against them.
Her only objective in the game is to find Eggman's "treasure", which turned out to be a huge room with thousands of capsules containing Shadow's clones, which were destroyed by E-123 Omega soon after. Upon this discovery, she attempts to inform Omega that the Shadow accompanying them was likely to be an android made in the original's likeness, but decided against it, although Omega deduced enough about what she was about to say and informed her that the original Shadow had to have existed if the Shadow Androids are present.
In Sonic Battle, Rouge is one of the most prominently-featured characters in the game, with her story being the third to be played through. She is the owner of Club Rouge, a casino in the Night Babylon' area of Story mode. During the story, when Sonic lent control of the Gizoid, Emerl to her, she trained him to be the ultimate jewel thief. Most of her fighting techniques appear to be derived from kickboxing. Her special attacks include sending a round bat that blows up towards her enemies, a powerful kick and sending what appears to be a ball of sonar energy into her opponents.
Rouge also appears in Shadow the Hedgehog, helping with the Hero missions in Digital Circuit, Death Ruins, and GUN Fortress. In Expert Mode, Rouge lends her voice to Shadow at the beginning of Cryptic Castle, Lava Shelter, and The Last Way (along with the voice of every other character that appears in Expert Mode). In her levels, she rescues the Chaos Emerald and fights the Black Arms when they are pushed back into the forest.
Sonic the Hedgehog (2006)
In Sonic the Hedgehog, Rouge appears as an "Amigo" character, playable in stages White Acropolis, Kingdom Valley, Flame Core and Tropical Jungle. She first appears escaping Eggman's base with Shadow after stealing the Scepter of Darkness as part of a mission from GUN. After escaping, Rouge and Shadow go to Kingdom Valley to find the GUN rendezvous point, however they are ambushed by Eggman and the Scepter is broken after a struggle. Mephiles the Dark emerges from the broken scepter and is reborn in Shadow's shadow and sends the two into the future.
Rouge then teams up with Sonic and his friends to find two Chaos Emeralds that enable them to return to their own time. Rouge returns to the present alone and realizes that Shadow has stayed in the future. Rouge then goes about finding E-123 Omega and sends him to help Shadow.
Rouge eventually finds that Omega and Shadow have found a way back from the future and so teams up with them once again to find Mephiles, Omega confesses that he betrays Shadow in the future and that one day the whole world will turn against him. Rouge assures her friend that "even if he believes everyone in the world will turn against him, she will always remain by his side". Rouge then helps Shadow, along with Omega, to try to defeat Mephiles and seal him in the new Scepter of Darkness. However this attempt does not work because Mephiles is using Shadow's form. Thanks to Shadow, the trio then defeat all of Mephiles' clones only to find out later than Mephiles actually escaped. She later helps the rest of the crew save Sonic.
Sonic Rivals Series
Rouge mainly appears in Shadow's story in Sonic Rivals. When she communicates with Shadow about what she discovered about Eggman, the transmission cuts off. Much later, when Eggman Nega (who is disguised as Eggman and took the picture of Rouge with his camera turning her into a card) threatens to take a picture (and trapping it) with his camera, the mad scientist is ultimately defeated and Rouge is freed from her card. Rouge appears in some of the 150 collectible cards.
Sonic Rivals 2
Rouge appears as a playable character in Sonic Rivals 2. During the storyline she worked with Knuckles the Echidna, her rival, to find the Master Emerald and the Chaos Emeralds. To do so, she stole Eggman's emerald detector to find them. She and Knuckles found themselves having to battle with other rivals and Eggman Nega (unknown to the duo, he is disguised as Eggman) in order to find the Chaos Emeralds while Knuckles was unable to find the Master Emerald. Rouge found six emeralds which opened a portal to another dimension.
Rouge was dragged into the portal by Knuckles, leading to her finding herself separated from Knuckles in another dimension. When she found Knuckles, she saw that his mind was being controlled by the Ifrit, a big fire monster that could destroy the world. Rouge managed to defeat the Ifrit and saved Knuckles, she then found the emerald detector destroyed and saw the Master Emerald inside it. The two returned to their own dimension. Knuckles took the Master Emerald but was then distracted when Rouge calls him dashing, giving her enough time to take the Emerald from his grasp and run from the scene.
Sonic Chronicles: The Dark Brotherhood
Rouge appears as a playable character in Sonic Chronicles: The Dark Brotherhood. She is the fourth person to join Sonic's group and is assigned by the GUN Commander as a "representative" of the organization. When the group reaches the Kron Colony it is revealed that Rouge was sent by GUN to gather some Nocturnus technology. The player can choose to help her by obtaining various amounts of Nocturnus Tech. Her overworld abilities allow her to fly (better so than Knuckles but worse than Tails and Cream) and the Stealth ability—one that she shares only with Shade. In battle, she has low attack power and low armor, but gets to attack twice per round. She can weaken, distract and even steal items from her foes.
Sonic Free Riders
In Sonic Free Riders, Rouge, along with Shadow, decided to enter the World Grand Prix in Extreme Gear as Team Dark. Rouge, however, was only interested in the large cash prize and treasure that was given to the winners of the tournament.
As the World Grand Prix had started, Rouge and Shadow were 15 minutes late to the opening ceremony. When they arrive, Omochao complained about their tardiness, but Rouge told Omochao that she and Shadow were only here for the award. As such, she was only interested in meeting up to the races and for the rest of the time, she was off the clock. When Omochao asked them about their third member, Rouge said they did not have one as she believed she and Shadow would do just fine. Omochao, however, said that it was against the rules and they could get disqualified. Discontent with the rules, but accepting them, Rouge asked Omochao if he wanted to a part of her team, but he refused. Rouge then spotted a E-10000B robot and temped him to come by calling him "handsome". Despite the E-10000B's reasons for coming by, Rouge found the robot available at the moment and had it join the team.
In their first race, Team Dark was put up against Team Babylon. During their races, Rouge teasingly insulted Team Babylon by asking them how they could have ever gotten any treasure when "moving that slow". In the end, Team Dark beat Team Babylon, and Rouge gloated over her team's victory by telling Wave that she felt bad for them.
In the next race, Team Dark went up against Team Heroes. During their races, E-10000B began to wear down from overheating and Rouge displayed some teasing doubt for her robotic teammate. As Tails began to worry about E-10000B's condition, Rouge told him that if E-10000B would break down, he would get canned, much to Tails' disgust. Eventually, Team Dark defeated Team Heroes, and Rouge thought it was now finally time for the award ceremony. Omochao, however, told Rouge that they still had to face Team Rose in the finals. Confident, Rouge told Omochao that her team was sure to win and asked him why they did not just skip to the award ceremony already. As Amy promised to avenge Sonic's defeat, Rouge responded by telling her that she would rather join him in their "pitty party".
As Team Dark was just one race away from winning against Team Rose, E-10000B began to reach critical levels. Team Rose berated Rouge for treating a teammate like that, but Rouge brushed off their comments, as she believed that E-10000B was just a machine, and insisted on continuing the race. After winning against Team Rose, Rouge and Shadow left the tracks and hurried over to the Grand Prix Headquarters and stole the cash purse and treasure from there, before taking their leave. When Omochao found them, Rouge told him that since they had earned the prize, she had gotten what she came for and saw better use of her time than wasitng it on the award ceremony. Rouge was, however, surprised to hear from Omochao that what they had taken was just dummy drops for display and that the real prize was locked away in a safe, and they had to attend the award ceremony to receive it. Rouge, however, found it annoying and their efforts a waste of time.
As the World Grand Prix proceeded, Team Dark received their own fair share of defeats. During these races, Rouge displayed her general confidence to the opposing team that she and her team would win the grand prize, while mocking their efforts, only to be defeated each time. Despite this, Rouge is impressed by their opponents' skills.
Near the end of the World Grand Prix, Team Dark and the other teams came down with an equal amount of victories, and Rouge, with the rest of her team, came to the award ceremony to collect their prize. Once there, however, Rouge and the others were told by Dr. Eggman (under his alias King Doc) that they had one more race against his Gear-jockey robots. As she was heading out to the track, Rouge was surprised to find E-10000B, whom she had thought was out of commission. After the race, Rouge could not find Eggman and thought that the doctor had left to avoid paying them the treasure. Eggman then revealed himself and announced that that he had been collecting all the data on the racers in the Grand Prix with his E-10000 to make the ultimate Extreme Gear that he could use for his own agenda and challenged Rouge and the others to a race. After beating Eggman, Rouge noticed that E-10000B looked a little shaky, but then Metal Sonic revealed himself as the one controlling E-10000B and passing fake data to Eggman.
Rouge and the others watched as Metal Sonic challenged Sonic the Hedgehog to a race, in which Sonic soundly defeated his robot copy. Afterwards, it was revealed that Eggman never had any prize to give to the winners of the World Grand Prix, but Rouge remarked that she would be lying if she had said that she had not seen this coming.
Sonic Colors (DS)
Rouge appears in an extra mission in Starlight Carnival in the DS version of Sonic Colors. She tricked Knuckles into coming to Eggman's theme park, much to Knuckles' dismay but for unknown reasons.
In the console/PC version of Sonic Generations, Rouge attended and helped preparing Sonic's surprise birthday. When Sonic arrived, Rouge and the rest welcomed him. As the party started, Rouge began talking with Knuckles when the Time Eater suddenly appeared. Rouge was then sucked into one of the Time Eater's Time Holes and ended up at City Escape in the White Space, where she was turned into a statue due to the Time Eater's effects.
Eventually, Rouge was returned to normal by Classic Sonic (Sonic's past self) and Modern Sonic (Sonic's present self) In the scenario where Classic Sonic rescues her, Rouge thanked Classic Sonic upon her restoration, and warned him that the Time Eater was nothing she had seen before. Noticing Classic Sonic's different look, Rouge added that Classic Sonic looked nothing like the Sonic she knew. In the scenario where Modern Sonic rescues her, Rouge thanked Modern Sonic when she was restored, before telling him that this was the first time she herself got stolen.
When Classic and Modern Sonic confronted the Time Eater, which was revealed to be controlled by Modern Eggman and Classic Eggman, Rouge arrived at the battle with the others and cheered on both Sonics, allowing them both to transform into Super Sonic. When the Sonics defeated the Time Eater, Rouge and the others were send back to the present. Continuing with the celebration, Rouge talked with Knuckles and later waved goodbye to Classic Sonic and Classic Tails when they returned to their own time.
Pre-Super Genesis Wave
Other Game Appearances
Sonic Riders Series
Rouge appears in Sonic Riders as an unlockable racer. She is the strongest flight-type character (after Wave) in the game. Rouge plays no active role in the story; however, the official website states that Rouge has some kind of rivalry with Wave the Swallow.
Sonic Riders: Zero Gravity
Rouge returns in Sonic Riders: Zero Gravity as an unlockable racer, but, again, not in the storyline. She is unlocked by completing Heroes Story in Story Mode. Also, she is a flight-type character and can transform her Extreme Gear, Temptation, to an Air Ride with a Gear Part.
Mario & Sonic Series
Mario & Sonic at the Olympic Winter Games
Rouge appears in the game Mario & Sonic at the Olympic Winter Games as a boss in Festival Mode that the player may compete against, as well as Jet, Omega, and Eggman Nega. She is the boss of the figure skating event, and after beating her, the player can buy her costume, which gives Rouge stats to the selected Mii. Rouge also appears in the DS Adventure Tours working for Mario and Sonic to find stolen objects from the museum for White Stones. However, she will challenge Mario and Sonic to a Figure Skating match since Bowser and Dr. Eggman bribed her with a huge amount of White Stones. Rouge will help recover the next Snow Spirit from Eggman and Bowser after her defeat and continue working for Mario and Sonic.
Mario & Sonic at the London 2012 Olympic Games
Rouge later returns in Mario & Sonic at the London 2012 Olympic Games as a rival in London Party Mode. This time, the player competes against her in 110m Hurdles. The Rouge costume with her stats for the selected Mii also returns where it easily be purchased through Blank Exchange in Bonus Mode. In the 3DS version she is fought by Peach in Hyde Park saying she was going to trap them (Peach, Amy, Daisy and Blaze) in the fog. After she is defeated she claims to have no memory of what she had done. She then says the last thing she remembers is being in the British Museum looking at the art and artifacts there when the room fills with fog. She then remembers breathing some in (mind-controlling her) and after that nothing except someone telling her to trap them in the fog. She then leads them to the Fog Machine and Blaze destroys it. She then stays with them and helps clear the fog coming from Big Ben.
Appearances In Other Media
Rouge is fond of riches, especially rare, beautiful gems, and has often searched for or stolen jewels. She has had several run-ins in the past with Fiona Fox and Nic the Weasel, often beating them to rare treasures, and thus has something of a former rivalry with the pair.
Rouge appears in Sonic X as an agent for the president and friend of one of his agents, Topaz. She fought in the Chaos Emerald Martial Arts Tournament and also helped Sonic and the others find the Kingdom of Maracia.