Machi Komacine hails from Meteor City, a lawless junkyard settlement where residents lack official records. In childhood, she witnessed her friend Sarasa's brutal murder, discovering the mutilated body hanging in a bag; Machi insisted on bringing Sarasa home and apologized to her lifeless form, revealing an early capacity for grief amid violence. This trauma, combined with Chrollo Lucilfer's leadership, cemented her loyalty, leading her to pledge lifelong allegiance to him alongside Uvogin and six others. She learned Nen under Renko in Meteor City's Kirimori Valley, using these skills to prepare Sarasa's body for burial. Machi became a founding member of the Phantom Troupe and took part in the massacre of the Kurta Clan, demonstrating ruthless violence alongside her comrades. Her Transmutation Nen converts aura into nearly indestructible threads. These threads serve multiple functions: suturing wounds or reattaching limbs with medical precision, creating lethal traps, binding opponents, and tracking targets via vibration-transmitting needle-embedded threads. Thread strength inversely correlates with length, making shorter threads more durable. She possesses exceptional physical prowess, ranking sixth in strength among the Troupe, and endures significant injury without faltering, such as continuing to restrain Gon after Killua stabbed her abdomen and broke her ribs. Machi maintains a consistently cold, emotionless demeanor, rarely showing vulnerability. Yet she harbors profound loyalty to the Phantom Troupe, especially Chrollo, vowing to hunt Hisoka "to the ends of the earth" if he killed their leader. She mourned Pakunoda's death and visited her grave, indicating capacity for camaraderie. Her sharp intuition is highly trusted by allies like Nobunaga and Chrollo, often proving accurate in critical moments. She views Hisoka as a nuisance or threat to Chrollo, expressing only mild concern after his temporary death, hoping he "learned his lesson" upon revival. Their dynamic shifts when Hisoka immobilizes her with Bungee Gum after faking his death; she reacts with uncharacteristic rage, screaming at him as he declares his intent to exterminate the Troupe. During the Yorknew City arc, she joined the auction heist and Uvogin's rescue. Later, she assisted in capturing Gon and Killua, using her threads to immobilize Killua even while injured. When Kurapika captured Chrollo, she advocated for compliance with the chain user's demands to protect him, nearly fighting Feitan and Phinks over their opposition. She received Pakunoda's memories via Nen bullet, learning Kurapika's secrets before Pakunoda's death. In the Greed Island arc, she initially declined to enter the game but joined upon realizing it could help find a Nen exorcist for Chrollo. She confronted Hisoka within the game, explicitly threatening him against harming Chrollo. Later, she verified Hisoka's corpse after his battle with Chrollo, only for him to revive and ambush her. She subsequently joined the Troupe's hunt for Hisoka aboard the Black Whale, separating to track him independently.