Children: Miranda Montgomery (by means of rape by Michael Cambias)
Mother: Erica Kane
Father: Travis Montgomery (deceased)
Stepmother: Barbara Montgomery
Siblings: Kendall Hart (half-sister), Molly Montgomery (half-sister), Matthew Montgomery (half-brother)
Grandmother: Mona Tyler
Grandfather: Eric Kane
Uncle: Jackson Montgomery, Mark Dalton
Aunt: Christine "Kit" Montgomery, Silver Kane (deceased)
Cousin: Greenlee duPres Smythe , Lily Montgomery (adoptive), Reggie Porter Montgomery (adoptive), Julie Rand
Significant romantic relationships: Sarah, Frankie Stone, Lena Kundera

Bianca Montgomery is the pride and joy of her mother, the famous and beautiful Erica Kane. When Bianca was a child, Erica began an affair with Jackson Montgomery, while still married to his brother Travis, Bianca's father. Erica divorced Travis and started to openly see Jackson. Bianca, unable to deal with her mother wanting her uncle, set fire to her dolls in Erica's house. Travis sued for sole custody of Bianca and called Jackson to the stand, forcing him to admit to his affair with Erica, which ultimately led to Erica losing custody of Bianca. Travis and his wife, Barbara, moved with Bianca to Seattle, where she spent most of her childhood.

Bianca would frequently visit her mother in Pine Valley for extended periods of time. While Erica was married to Dimitri Marick, Bianca met her newfound half-sister Kendall Hart. Jealous of Bianca's bond with Erica, Kendall hated Bianca, and the feeling was mutual. Bianca was nearly attacked by Erica's rapist, Richard Fields (Kendall's father) when Kendall (in search of the truth of her conception) brought him to town.

A few years later, Bianca developed anorexia and nearly starved herself to death. Bianca's family decided to try therapy to help her. During her therapy, she pulled out her feeding tube, and finally admitted her feelings about the loss of her mother at a young age, the involvement of her uncle with her mother, her dysfunctional relationship with her sister, etc. Bianca admitted that she was anorexic and moved back to Seattle, where she was able to get the treatment that she needed.

Teenaged Bianca returned in 2000 with a secret. Bianca bonded with Erica's latest beau, David Hayward, and became best friends with Leo du Pres (who was residing at Erica's house). Erica felt the need to make up for all of her lost time with Bianca. Bianca often felt crowded by Erica's dominant presence in her life, and their relationship became strained. Bianca was also keeping a secret from her mother for fear of Erica's rejection and disappointment. Bianca was gay.

Erica and Bianca's relationship remained tense, as Erica felt the need to be actively involved in all aspects of her daughters life-particularly her lack of a boyfriend. Erica decided to throw Bianca an extravagant sweet sixteen bash, which Bianca didn't want. Bianca found out at the end of the night that her father had died suddenly in Seattle. Unfortunately, Bianca never had the chance to tell Travis that she was a lesbian. Erica was granted sole custody and Bianca moved to Pine Valley permanently.

Bianca began to search for her ex-girlfriend Sarah, whom she had met while in therapy for anorexia. When she found Sarah, she was informed that Sarah was about to be married to a man and refused to accept her homosexuality or a relationship with Bianca-thanks to her conservative and disapproving parents. Bianca began befriending a runaway named Rain, who introduced Bianca to a gay bar. Leo and Greenlee Smythe followed her into the bar and were shocked, as Bianca's comfort and behavior inside indicated she was a lesbian. Leo completely accepted Bianca, while Greenlee, never fond of Bianca, held this information over Bianca's head. When Bianca saw a drugged Greenlee push Laura English overboard at a yacht party, Greenlee threatened to tell Erica that Bianca was a lesbian unless she kept her mouth shut.

Bianca continued to hide the truth from her mother until the tense relationship with Erica reached a boiling point. Bianca emotionally confessed to her mother that she was gay. Erica went through a range of emotions from denial to anger. Meanwhile, with her blackmail information nullified, Greenlee reported Bianca's homosexuality to the tabloids, and sleazy reporter Donald Steele outed Bianca.

Bianca and Erica began their bumpy road to reconciliation. Erica blamed herself, then Travis, then everyone else who had ever entered Bianca's life - never believing that Bianca could possibly be a lesbian. Erica had always wanted Bianca's life to be idyllic but her daughter's homosexuality threatened her vision of Bianca's future, and posed more difficulties that Bianca might face in life. Eventually, with the help of those who cared about her, Erica began to move on and realized she wanted what's best for her daughter. Erica accepted, supported and eventually embraced her daughter's identity. Bianca began developing a crush on Laura. Laura was straight, but Bianca was able to put her feelings aside.

Later that year, Bianca began getting involved with grifter Frankie Stone. Bianca and Frankie developed a very close relationship. Erica, believing Frankie a crook, did not like this and tried several times to drive Frankie out of town. Bianca and Frankie had just reached a point in their relationship where Frankie admitted her feelings towards Bianca, but an emotionally confused Frankie freaked out and hooked up with JR Chandler. Bianca walked in on them together. Soon after, Frankie was murdered. Erica confessed (believing that a jealous Bianca was responsible) that she killed Frankie, but in the end it was revealed that Frankie's aunt murdered her. Soon after the charges were pressed against Erica, Maggie Stone (Frankie's identical twin sister) came to town. Bianca and Maggie became close as they bonded over the loss and life of Frankie. Despite Bianca developing feelings for Maggie, Maggie made it clear she was straight. Regardless, the two quickly became best friends.

Bianca began working for her mother at Enchantment and met the beautiful Lena Kundera. Lena was secretly working (and sleeping) with Michael Cambias to take over Enchantment, but genuinely fell for Bianca. Once Bianca found out that Lena had been lying to her and used her position as Erica's daughter to break into Erica's safe, Bianca broke up with Lena. She plotted along with Erica and Kendall to take down Michael-and by default-Lena. However, Bianca realized that she did truly care for Lena, and with the help of her friends, decided to give their relationship another chance (Lena had been cleared of charges in exchange for turning evidence against Michael). Just as Bianca began letting her guard down, Michael set Lena up, making it look like Lena was once again using sex with men to get herself ahead in the world. Bianca broke up with Lena and vowed to never wear her heart on her sleeve and be hurt again. When it was discovered that Lena was telling the truth, the two reconciled.

Michael Cambias, having unsuccessfully tried to assault Kendall and Erica, raped Bianca in a cruel attack against her mother and sister. During a storm, Bianca burned her clothes and shut down as a result of the rape. She immediately closed Lena out of her life. Erica believed Bianca when she said that she was just upset because she and Lena had broken up. David noticed that Bianca was troubled and even found her near the edge of the clinic rooftop. While drunk, Bianca let it slip to Maggie that she was raped.

Bianca pressed charges against Michael, but after a pre-trial hearing, he was freed due to lack of physical evidence. Bianca learned that she was pregnant and struggled with whether she should terminate the pregnancy. After keeping it secret from Erica for fear of her reaction (Erica had gotten pregnant as a result of rape), she told her mother the truth. Erica urged Bianca to terminate her pregnancy and Bianca seemingly agreed. However, after a last minute conversation in which her sister Kendall (a child of rape) urged her to "do whatever she needed to," Bianca decided to keep her child. Bianca kept this secret from Erica, for fear of the psychological effects this would have on her mother.

Despite Kendall's claim that she had married Michael shortly after Bianca's pre-trial hearing, the two sisters grew closer. Michael's dead body surfaced and Bianca stood by Kendall, who was under suspicion from the police. Kendall learned of Bianca's pregnancy and vowed to keep her secret. When Ryan Lavery almost discovered the truth about Bianca's pregnancy via a sonogram of her unborn child (and in doing so, would reveal the truth of Bianca's baby as the true Cambias heir), Kendall covered and claimed that the sonogram belonged to her. In an effort to protect her sister and unborn child, Kendall went public with the claim that she was carrying Michael's child. With the help of David, Bianca donated her blood in order for Kendall to prove that she was pregnant. The two sisters formed a tight, unbreakable bond with each other.

Bianca relied on Maggie's strength during her pregnancy. Bianca also confided in Lena about her pregnancy, and the two grew closer, although Lena respected Bianca's need for space after her traumatic rape. Unbeknownst to Bianca, Maggie began to develop deeper feelings for her friend, prodded by jealousy at seeing Lena and Bianca's closeness. Maggie even kissed Bianca, but managed to convince Bianca it was just friendly.

When Kendall's fake pregnancy was revealed thanks to Greenlee, Bianca came forward to Erica and admitted that she was still pregnant. Erica, shocked and feeling betrayed, shut down. Bianca began having flashes of the night that Michael was killed and started to believe that she witnessed her mother kill Michael. However, just as it looked as if Erica would confess to the murder to protect an increasingly guilty Kendall, Bianca realized that SHE had killed Michael and had blocked the memory out. Bianca confessed her crime and no charges were brought against her (she shot Michael in self-defense).

Erica remained emotionally shut down after learning of Bianca's pregnancy, but after being accosted by a reporter, told Bianca that to bring a child of rape into the world would only result in pain for mother and daughter. Hurt off Erica's words, Bianca and her friend Babe Chandler went for a drive, only to be stranded in a secluded cabin following a flash flood. Bianca went into labor and Babe helped deliver a baby girl, who Bianca named Miranda. Soon after, Bianca passed out due to post-labor complications. Babe, who had begun labor herself, managed to get a hold of her ex-lover Paul Cramer, and he delivered Babe's child, a boy. Bianca remained unconscious through it all.

Paul, in a scheme to get his sister Kelly Cramer (of One Life To Live) a baby, drugged Babe and gave her boy to Kelly. He then faked a helicopter crash, prepared to tell the world that Babe's child was killed. However, Babe's husband, JR, and father-in-law Adam came upon the staged crash and threatened Paul if he didn't produce Babe's child. Panicked, Paul told them that Miranda was the child Babe had given birth to. Babe, who had a fuzzy memory of the event thanks to a drugging by Paul and a post-labor infection, believed Paul's version of events as a truth. JR named his newfound daughter Bess.

Unable to cope with Miranda's death, Bianca kidnapped Bess from the hospital, believing her to be Miranda (which, still unknown to all, she was right about). Kendall and Ryan had to force Bianca to realize that her baby had died. Bianca faced the truth and began to mourn her daughter. Babe, unaware of Bess's true maternity, promised to make Bianca a part of Bess's life. This did not sit well with JR, who was uncomfortable with Bianca being near his daughter.

Devastated off Miranda's death, Bianca verbally attacked Erica, claiming that Erica got her wish-Miranda, the child of rape, was gone. Despite Erica's attempts to console Bianca, Bianca told her mother she never wanted to see her again. Erica began to drink heavily, and eventually Bianca and those that loved Erica staged an intervention. Bianca and Erica began attending rape support groups together, and their relationship slowly healed.

At Bess's christening, Babe named Bianca as Bess's godmother. By this time, Babe was aware that Bess was Miranda, but believed her own son was dead. To prevent JR the pain of losing Bess and his own son, Babe kept quiet about Miranda. She pledged to Bianca that she would always be in Bess's life as her godmother. Bianca bonded with Bess, still feeling the loss of Miranda.

Lena, at Bianca's urging, left for Poland to care for her sick mother. The two began a long distance relationship. Maggie's feelings for Bianca intensified, and she admitted she loved her. Bianca told Maggie she was committed to Lena, but promised to support Maggie as she came to terms with her sexuality. Embarrassed and vulnerable, Maggie told Bianca her feelings were a result of temporary confusion. Maggie began dating Jonathan Lavery.

Jonathan and Bianca clashed over Ethan Ramsey's presence in Pine Valley. Ethan had arrived in town claiming to be the grandson of Alexander Cambias. This possibly made Ethan Miranda's cousin. Bianca believed she saw a bit of Miranda in Ethan, and a friendship developed. She supported Ethan's quest to prove he was a Cambias, and offered the shirt she gave birth in, which had traces of Miranda's DNA. This was the last physical connection Bianca had with Miranda, but she offered it to Ethan so he would prove his heritage. Bianca was trying desperately to heal herself after Miranda's death, but found it impossible.

Jonathan, who wanted to protect his brother Ryan's place as the head of Cambias Industries, burned the shirt so Ethan would have no evidence to help him. Bianca suspected Jonathan and confronted him, but Maggie covered for her boyfriend. Bianca later learned Maggie had lied about Jonathan burning the shirt, and was hurt by her friend's actions. Lena, unable to deal with the long distance relationship, broke up with Bianca.

Babe began to suspect that JR really hated her and possibly drugged her to prove her an unfit mother. Bianca and Babe, in an effort to test JR's true feelings, made it appear as if they were having an affair. A gleeful JR told Babe he hated her and would use her affair with Bianca to get custody of Bess. Babe and Bianca revealed the set-up and Babe seemed prepared to drop a bombshell when they got word that JR had Bess whisked away to a secret location. Bianca worried where her goddaughter was, and thanks to Tad Martin and David, Bess was found soon after. Babe shocked Bianca and everyone else when, after a long drive, she announced she wanted to reconcile with JR for the sake of Bess. Later, Babe (thanks to a blackmail scheme by JR) signed over custody of Bess to him. Bianca was confused by Babe's actions, but Babe promised her friend that everything she did would make sense in the end, and reaffirmed to Bianca that she would always be a prominent part of Bess's life. Bianca believed that Babe was planning on kidnapping Bess, and supported her friend.

Babe left town with Jamie, but not Bess. Bianca learned that Babe had left a letter for her, but she never received it. Bianca confronted a nervous JR with the contents of Babe's letter, and JR claimed that Babe said that Bess was Miranda as a way to hurt JR. Refusing to believe Babe would tell such a hurtful lie, Bianca was determined to get the real story. Babe later made contact with Bianca and begged her to take JR and Bess along with her to the upcoming Miranda Montgomery benefit concert in Florida. Bianca believed that Babe was planning on kidnapping Bess in Florida. Believing Babe to be a more suitable parent than JR, Bianca was prepared to help her friend.

Babe met Bianca and Bess in JR's hotel room. She explained that Jamie had distracted JR so Babe could tell Bianca her news face to face. Babe told Bianca that Bess was really Miranda. She explained how Paul Cramer had switched Miranda at birth, and how Babe found out. Babe told Bianca she kept the truth from her to protect JR, only to learn that JR hated her. Babe went on to explain that as soon as she realized this, Babe learned that her own son didn't die in the crash, but was alive. Babe revealed that she had kidnapped the boy, who she named James, from Llanview. Babe urged Bianca to pick up Miranda and get an authorized DNA test so she could take the baby from JR. Disbelieving at first, Bianca began to piece together Babe's odd behavior over the last few months and her story made sense. Bianca looked into the baby's eyes and realized that Babe was telling the truth. Miranda was alive. Disgusted with Babe, Bianca slapped her and ordered her out of her life. Babe left, and JR arrived soon after. Bianca told JR that Bess was Miranda and that she was taking her daughter back. JR tried to lock Bianca onto a balcony in order to escape with Bess, and in the process Bianca fell off the balcony. The injured Bianca slipped into a coma, and her prognosis did not seem good.

Erica learned that Bess was Miranda and demanded that Adam authorize a DNA test which would legally prove it. Adam agreed, the results came in and Erica took back Miranda from JR. She rushed to the hospital, where she urged Bianca to wake up and be a mother to Miranda. Erica's pleas worked, and Bianca was reunited with her baby. Whether she will tell a grieving JR that his son is alive and with Babe remains to be seen.