Born Cassandra Lane, Ballistic was raised by her mother and father. Like her sister, Velocity, Cassandra possessed innate abilities which manifested themselves as she grew older. Her father left the family at a young age and was replaced by an abusive step-father. One night, after the girl's step-father beat their mother, Cassandra killed him by throwing a comb through his heart. This resulted in Velocity being sent to an orphanage and the family separating.
Cassandra learned to use her powers of superhuman athleticism and hand-to-eye coordination as a teenage girl and eventually became the star pitcher of her high school baseball team. Her ex-boyfriend, Tony, became jealous of her success and led a gang of guys to cripple her throwing arm.
Sometime later in her life, Cassandra was approached by the company Cyberdata. Cyberdata replaced her crippled arm with that of a highly advanced bionic one. In the process they brainwashed her and trained her to become a Special Hazardous Operations Cyborg (SHOC) thus creating Ballistic.
Cyberdata assigned Ballistic to re-capture her own sister, Velocity. Ballistic was close to accomplishing her mission until Cyberforce arrived and stopped her. Cyber Force took Ballistic with them as well eventually ridding her of a brainwashed state and helping restore her lost memories. Finally re-united with her sister, Ballistic became a member of the group. Years later during a mission to help a friend she learned that the man she had known was really her biological father. He died on the mission never revealing this, her finding out through photographs he kept in his locker. Cassandra and Morgan Stryker would finally give in to the sexual tension that had been building since the two met and began a relationship (of sorts) just before the fall of Cyberdata.
When an old friend, named Shields came to visit her, in a bad shape; Ballistic went to see Killjoy who was also on the mission where Shields was, but found her torn-up as well. Killjoy revealed the location of their last mission, and ballistic decided to go there to find out what happened to her friend. She however wanted to see how Shields was doing before leaving, that night she was turned into Ethereal by Shields' bite. She started to hear Kracus' thoughts in her head, but fought against his call. She arrived to the mission location, and was greeted by Wetworks, while fighting them Ballistic turned more feral and was about to take a bite out of Jester, but was stopped by Mother One. Ballistic was given an inhibitor that sealed away the vampiric side of her. Wetworks asked her to join their mission to release captured Ethreal from Cyberdata and she agreed.
Later it turned out that the captives had escaped, and Kracus had released all his power and was on a killing s pree. Ballistic had trouble trusting Mother One as she felt that she is connected to Cyberdata somehow. When they arrived to Kracus, and the first plan to nuke him failed, Mother One removed Ballistic's inhibitor to use her Ethreal abilities to fight Kracus. Dia taught Ballistic to control herself better as Ethreal. In a fight with Kracus, Ballistic blasted the Brain Box out of Kracus and that returned him to his regular self. Ballistic promised to look after Kracus and Dia, as she was one of them now. Mother One returned the inhibitor to Ballistic.
Agents of the Hunter-Killer program attacked members of Cyber Force, believing that they were a group of ultra-sapiens rogues. In the introductory skirmish, Wolf manages to surprise Ballistic from behind, she responds by firing a bullet that ricochets off multiple walls and hits him in the arm. During the battle
Heatwave becomes incapacitated, but Cyber Force gains the upper hand in the fighting. Ellis, returning to the Hunter-Killer program convinces Hunter-Killer to lay down their arms and ally with Cyber Force to prevent a plot between Cyberdata and Morningstar. Wolf, Samantha Argent, and Ellis ended up turning themselves to Ballistic.
It is revealed that Morningstar sent Hunter-Killer to eliminate Cyber Force before both parties can interfere in their plans. The teams ally and split up to destroy servers for JETT (mobile device in which Cyberdata and Morningstar are using to influence others), with Ellis, Architect, and Ballistic going to Tokyo. They are the only team somewhat successful.
Ellis puts his life in danger by overloading and absorbing the powers of Architect and Cloaker at the same time. Using those powers, Ellis teleports Ballistic, Argent, Ripclaw, and himself to where Morningstar is holding the others captive. Ballistic manages to free Cyblade and her sister with well placed shots that disable the device that was holding them captive.
Ballistic took part in the Artifacts story-line. Cyber Force's HQ is infiltrated by Aphrodite IV. Ballistic places a gun at her head, which opens up dialogue. Ballistic states that if Aphrodite gives her a reason to shoot she will. Aphrodite tells Cyber Force that a group is gathering the 13 Artifacts to destroy the world and that they must be stopped.
Ballistic and the other members of Cyber Force begin a battle with Danielle Baptiste, Magdalena, Tom, Sara Pezzini, Jackie Estacado, Tilly Grimes, and Abigail van Alstine. When the group deciphers that Aphrodite is lying to them about this groups wanting to destroy the world, Ballistic does not hesitate to shoot the AI in the head. However, Aphrodite regenerates and subdues Ballistic and those gathered before Sara Pezzini defeats her.
Ballistic fights an army of Aphrodite's lead by Glorianna Silver with Hunter-Killer and the other Artifacts bearers.
Ballistic was born with innate mutant powers which grant her uncanny hand-to-eye coordination. She has received training in unarmed combat, throwing weapons, and firearms and has a bionic arm which grants higher levels of strength and durability. With the combination of bionics, training, and mutant powers, Ballistic is not only a dangerous hand-to-hand combatant, but is also a marksman of unparalleled skill.