Sometime later in August 1996 (changed to October 1995 in the anime), Roberta accompanied Diego Lovelace when he went to Barinas, Venezuela to campaign for the political party MVR. As Diego was on stage with the MVR's leader named Morales, Roberta watched helplessly as a bomb was set off, killing several people including her master Diego. At Diego's funeral, Roberta consoled Garcia as the boy cried on her chest. The young child asked his maid why was his father a victim, to which Roberta responded that Diego had nothing to be ashamed about in the face of God. Despite Garcia ordering her not to pick up gun-fighting anymore, Roberta decided to go into battle again with her Bloodhound persona, seeking revenge.
Although it was reported that a member of a right-wing militia was arrested for the bombing, Roberta knew that this cover story was too convenient, and members of the Venezuelan military sympathetic to the leftist party visited the Lovelace estate to tell Garcia Lovelace, the son of Diego, and Roberta about 6 conspirators with Western ties involved in the bombing. Accordingly, Roberta tracked down and killed all 6 members, the leader among these men being Marcos José Lucientes. After learning about the National Security Agency's involvement from Lucientes, Roberta then hunted down and abducted Colonel Simon Dickens, the head of the NSA's special operations in Latin America. After interrogating him by torturing Dickens with heated-up stones, she learned about the Grey Fox Commando Group and their concurrent mission in Roanapur, revealing her true enemy. Afterward, she burned down the abandoned hotel with Dickens inside, and she bought a plane ticket to Thailand as well as a bus ticket to Roanapur.
Consequently, Roberta arrived in Roanapur with various weapons, including a Charleville musket passed down from multiple generations of the Lovelace family, and went to the Yellow Flag. While Bao was cleaning up the bar as it was closed, Roberta showed up and asked him for a bottle of tequila. Completely scared of her, Bao gave her the entire bottle, which she drank quickly and then asked him for every shop that could help her wage a war. He refused to fulfill her request, but she crushed her glass and clarified that she was not joking. The terrified bartender then directed her to the businesses of Praiyachat, Tou Chi, and Richie Leroy. She went to Praiyachat to repair her musket, then to Tou Chi for musket gunpowder, and finally to Leroy to receive shelter. She also visited Doctor Hartland for stimulant medication that she would use to keep herself awake and full of stamina.
Meanwhile, Garcia found out about Roberta leaving to get revenge on his behalf, so he and another Lovelace maid, Fabiola Iglesias, went to Roanapur together to find her, first seeking help from the Lagoon Company. Fabiola found Rock and Revy at the Yellow Flag and after destroying the bar there in a short firefight with the Colombian Cartel, brought the rest of the Lagoon crew to the Sankan Palace Hotel. There, Mister Chang of the Hong Kong Triad also visited Garcia's room to offer help in tracking Roberta, which Fabiola begrudgingly accepted. Garcia then recalled how members of the Venezuelan military visited his house as well as different people killed by Roberta matching her motive. The new, young Lovelace head then asked for Rock's help in particular, and he soon agreed, with Chang willing to provide help.
Afterward, Chang himself called for a Council meeting at The Golden Swingin Night Club between Roanapur's crime lords to provide information on Roberta's presence and motives in the city, as well as the story on Grey Fox's presence. After the meeting and a private discussion between Chang and Balalaika, the crime lords agreed to get both Roberta and the U.S. Army soldiers out of the city to prevent Roanapur's potential destruction, though Abrego was adamantly determined to kill Roberta to stabilize his cartel's relations with FARC. Elsewhere in her hideout, Roberta showed signs of a growing anger, taking mouthfuls of stimulant drugs and experiencing haunting hallucinations of her past victims, most notably a Japanese man. As she prayed for Diego's salvation and Garcia's safety, the apparition told her that she could not be saved no matter how hard she repented, angering her. During her fervent prayer, Leroy walked into the room and Roberta pointed a pistol at him in response, greatly startling him. He nervously clarified that it was only him and told her that he brought her the supplies she asked for as well as new clothes. Soon after Roberta dressed into her new combat clothes, Leroy informed her that the hitmen she hired from Bren the Black Death's murder-for-hire business were ready, thanking him.
At sunset, she left her hiding place, but not before dousing it with gasoline to blow it up and hide her tracks. When she got on the rooftop adjacent from the Tokaīna Hotel where Shane Caxton's team was staying, her apparition appeared a second time and said that it was not too late to turn back. Ignoring him, Roberta positioned herself and prepared for her attack. At the same time, FARC fighters of the Sumasas Brigade were in Roanapur on orders of Manuel Marulanda to kill Roberta with shelter and intel from Abrego of the Colombian Mafia. Per Roberta's plan, Bren's hitmen rushed inside Grey Fox's hotel, but they were easily rebuffed and killed. As the Grey Fox soldiers got onto the rooftop, Roberta used her sniper rifle to shoot at them, but they used a smokescreen and took cover, soon escaping to another rooftop out of her range. Nearby, Alberto Camarasa told his FARC fighters to engage her, but she casually blew away and killed the first squad, pole-vaulting to another rooftop to continue pursuing the Grey Fox unit. At night and further into her quest, she began to lose sight of her goal and continued to gulp down her stimulant pills, returning deeper into her Bloodhound persona.
In an empty building where Garcia was coincidentally, Roberta prepared several makeshift weapons knowing that FARC fighters were entering the building. She killed three of them with ease, and to prepare for further combat, she used Rojez's corpse as a shield from other fighters. When two men saw the corpse, Roberta killed them with her fists, and the unfazed Camarasa witnessed and nonchalantly insulted her. She tried to counter his moves, but Camarasa knew her fighting style and managed to punch her in the stomach, pinning her down on her back onto a table. Amazed at her tenacity, Camarasa commented that she was no longer the hound they once knew but a stray wolf, adding that he knew her moves due to receiving the same training in Cuba from Cuba's military.
The Cuban man then elaborated that he did not want to kill her but instead re-recruit her for FARC due to her superhuman skill, stating that she could help revive and train the leftist guerrillas. He assured her that he would be successful in vouching for her due to his connections in Havana and if they brought back American heads. Garcia, who had been looking for Roberta in the building, overheard their conversation and grabbed a crowbar while hiding behind a corner. Roberta, feigning friendliness, agreed to work for Camarasa, even saying that she did not care about what could happen to her master anymore. She attempted to seduce him to distract him by putting her legs around him despite him pointing his pistol at her head. He agreed but warned her that he would shoot her if she tried anything unusual. As she undressed, she managed to fire a bullet into Camarasa's abdomen using a secret chamber in her belt buckle, greatly injuring him.
He tried to grab his pistol, but Roberta kicked it away and began bludgeoning him to death with her fists, killing him and frightening Garcia. Surprised at Garcia's presence, Roberta let out a loud scream upon seeing him faint, giving her position away to both Grey Fox as well as Fabiola's group of Revy, Shenhua, Frederica Sawyer, and Lotton the Wizard. Roberta cried while begging to Garcia to wake up, and the apparition of the Japanese man appeared once more, asking her if she was the one who imagined him as a voice of reason to dissuade her revenge. The Japanese figure revealed that she tore his family picture before ruthlessly shooting him in the forehead seven years ago when she was a member of FARC. Losing sanity of who was real or fake, Roberta thought that Garcia was just another hallucination, pointing a pistol at his head.
As she prepared to fire, Horner of Grey Fox intervened just in time to save Garcia, with Sanchez pushing her back using a smoke grenade. Wanting to pacify Roberta, Fabiola's group found her and tried to stop her. The drugged-up Roberta broke Shenhua's knife, Sawyer's chainsaw, and kicked Lotton in the groin, terrifying all of them. Roberta immediately recognized the terrified Fabiola, calmly telling the young maid to clean the living room and help their master. The killer maid then left to find Garcia, so Fabiola's group also pursued but lost her path. As Garcia was with Shane Caxton and some men in an alleyway, Caxton was warned by Balalaika about the maid's nearby presence, with the Vysotniki now offering help to Grey Fox to escape. Roberta jumped down from the rooftop onto Caxton, taunting him that she would kill all the "little foxes." The soldiers shot their rifles to push her back before she could kill Caxton, and Garcia also intervened on her behalf to prevent the soldiers from killing her. After Roberta hid once again, the Vysotniki used their military coordination to stave off Roberta and prevent her from chasing Grey Fox. In the manga, Grey Fox left via Roanapur's land bridge, whereas in the anime, the U.S. Army squad arrived at the harbor and boarded the Lagoon Company's boat to sail northward on the Mekong River, angering the hotheaded Roberta.
Defeated for now, Roberta returned to her hideout, where the Japanese man once again haunted her vision, annoying her enough to quickly shoot the wall and make the apparition disappear. Upon looking at the ground, she saw a packet of forged identity documents with an alcohol bottle on top. Taking the Spanish-language note attached to the bottle, she read its message: "The hunt is not over, I will tell you where the fox is." Drinking some of the alcohol, she laughed giddily as she poured some of it on her head, then thanking God for the message and proclaiming that she would tear the "foxes" to pieces. She soon went to the Don Mueang International Airport to board a plane leaving for Mandalay, Myanmar. As she sat down, she heard Eda, sitting in the seat next to hers, joke that she could have at least taken a shower. Roberta tried to attack the CIA agent, but the annoyed Eda blocked her attack and informed the maid that she had the location to where Grey Fox was headed as well as travel arrangements on land to speed up the process. Roberta glared at her and thanked her by saying that she would make the agent's death painless after her "fox hunt" was complete.
Finally in the Golden Triangle, Roberta arrived at the camp of Shue Yan, the man whom Grey Fox wanted to capture and secretly extradite to the United States. At the camp, she single-handedly killed the drug lord's guards and disarmed Shue Yan, blindfolding him and tying him to a chair with explosives and mines nearby. Unknown to her, Garcia and Fabiola were also on the boat that Grey Fox used to head to the camp, with Garcia providing a plan to Caxton to subdue Roberta and her rampage. As the Grey Fox soldiers entered the pitch black jungle, they came across the camp and saw the guards' corpses as well as noticing strange rods on the ground. Caxton and his men soon saw Roberta standing next to the subdued Shue Yan, and she pulled out her Charleville musket. Taunting them, she then kept the drug lord next to several Claymore mines to bait the soldiers, making Team Echo pursue her. In the anime, she cut off Shue Yan's ear as she carried him into the jungle.
In the jungle, Roberta began killing the soldiers using the flechette rounds she placed onto the ground, firing the rounds from her Charleville musket. As she killed more troops (including Wright, Gardner, and Sanchez) and terrified the survivors, Caxton radioed to her that he would surrender if she gave Shue Yan to his men, surprising Raymond McDougal, Caxton's subordinate who told him that his plan would not work. She refused until Garcia talked to her on the phone, surprising her. Agreeing angrily, Roberta saw the lone Caxton, Garcia and Fabiola standing far from her. She yelled that she would finish her revenge by killing Caxton, but before she could fire her gun, Garcia pulled out his own pistol and shot the U.S. Army major in the chest, terrifying her. She denied that her beloved Garcia would kill anyone, and the young boy told his maid that he wanted her to stop her revenge.
The head maid continued to deny his request, reasoning that Garcia actually did want revenge. To snap her out of her loss of sanity, the boy shot her with a fake bullet to show she was not dreaming, causing Roberta to shoot Garcia as well, with her bullet only grazing his kidney. She screamed in terror as she shot her master, but he ran up to her and kissed her, making her blush. He then told her that everything was okay and that she needed to end the "dance of death" that Roanapur reinforced in her. Caxton then woke up, showing that the bullet that hit him was a fake, albeit remarking that the force felt real. Infuriated, Roberta pulled out her pistol and asked why he was still alive, but Fabiola stood in front of her line of sight to calm her down.
Garcia ordered Roberta to put down her gun, remarking that he shot Caxton with a fake bullet. Now calmed, she hugged the child and responded that he had now grown up. The Grey Fox soldiers reported that Garcia would be fine but still needed medical treatment, so everyone prepared to help Garcia and Roberta leave. Disappointed, McDougal pointed his rifle at Roberta, telling Caxton that they could not just let her leave after she killed many of their comrades. Before he could shoot the maid, Caxton shot McDougal first, killing him. Afterward, Roberta helped Garcia onto Dutch's boat, where Rock saw them and was glad that his fake bullet plan worked, causing Fabiola to shoot him with a fake bullet and accuse him of exploiting her master. Finally, Fabiola bid Rock farewell, telling him that he could continue dancing with the dead.
In the anime OVA, Roberta had lost her right leg, left arm, her right eye, and index and middle finger of the right hand, the latter of which she severed herself and tossed to the ground after she took a bullet from an American sniper. In the OVA ending of episode 29, she was in a wheelchair after the ordeal (although for resting, not because of paralysis) alongside Garcia and Fabiola, meeting up with Caxton and the family of the Japanese man whom she killed seven years ago.