Christine, known almost exclusively as Chris, is a twenty-five-year-old operative from Eastern Europe and a member of the special task force assembled to confront the crisis caused by the Hapna drug. She is introduced as a figure of mystery, irreverence, and impulsive energy, standing out for her blatant disregard for conventional norms, particularly those related to gender expectations. Chris is characterized by her bold, audacious, and spontaneous nature. She lives life on her own terms, unconcerned with the judgments of others, a trait that manifests in her forthright manner of speaking and her tendency to provoke her more serious teammates, such as when she playfully ribs the more methodical Doug about his age.

Beneath this brash exterior, Chris harbors a complex and shadowy past that is central to her identity. As revealed during a mission to rescue her from captivity, Chris is a defector. Her true name is Alexandra, and she was once a spy for Russian intelligence. Years prior to joining the Lazarus team, Chris saw an opportunity to escape her former life following an airport accident. With her name appearing on the casualty list and her medical records indicating she had flatlined, she seized the chance to fake her own death and disappear. This act of self-reinvention allowed her to sever ties with her old identity and eventually resurface as a weapons expert working for the Lazarus mission.

Her primary motivation is not simply altruistic but is deeply rooted in this desire for a new, autonomous existence. Having literally died and been reborn as Chris, she is fiercely protective of the life she has built for herself. This makes her a dedicated member of the team, as her loyalty to her new role is a cornerstone of her chosen identity. Her role within the Lazarus group is that of the firearms specialist, a role she embraces with a noted fanaticism for weapons. During combat operations, she demonstrates high proficiency with various guns, often engaging in close-quarters fights with impressive physical choreography even when at a disadvantage.

Key relationships in Chris's life are defined by the ghosts of her past and her present loyalties. The most significant of these is with a woman named Inga, who was her handler during her time as a Russian spy. The series confirms a deep, romantic history between the two. Chris's decision to fake her death and defect was motivated in part by a desire to protect Inga, as her disappearance would have led to Inga's execution by the agency. The two women are shown to still hold genuine affection for one another, but a reconciliation is impossible due to their respective paths and the lethal nature of their work. In a poignant turn, Inga is the one who captures Chris, leading to her imprisonment on an oil rig in the Barents Sea. This event forces Chris to confront her past directly. On the Lazarus team, her relationships are built on mutual reliance and a growing, if unspoken, sense of family. When Chris is captured, her teammates, including Axel, Doug, Eleina, and Leland, mount a dangerous rescue mission, demonstrating that her value to them extends far beyond her combat abilities. Even the team's leader, Hersch, acts to facilitate the rescue, showing a vested interest in keeping Chris alive.

Chris's character development is catalyzed by the forced confrontation with her former life. While initially presented as a carefree and mystery-shrouded combatant, the revelation of her defection and her unresolved feelings for Inga add poignant layers to her personality. She is shown to be someone who is capable of carrying out a long-term, life-altering plan to secure her freedom, revealing a calculated and resilient core beneath her reckless demeanor. Her abilities are formidable and primarily combat-oriented. Beyond her expert marksmanship and handling of a wide array of firearms, she is highly skilled in hand-to-hand combat, capable of holding her own and executing complex fight sequences even when bound or outnumbered. Her physical prowess, combined with her daring and unpredictable personality, makes her a volatile and effective asset to the team. She also possesses a noted large appetite, a small but consistent detail that underscores her earthy, live-in-the-moment personality.