Being a Shadowhunter, Beatriz was placed on the more advanced curriculum stream for Shadowhunters and special cases (such as famed Simon Lewis—a mundane placed on the stream) that their kind consider elite. With fellow students Jon Cartwright and Julie Beauvale, she befriended Simon and his roommate George Lovelace. When Simon and George left the stream, and their little group, because of Jon and Julie's harsh words for Downworlders and mundanes, she was impressed by Simon's decision and asked them both to remain friends with her.
Beatriz was eager for the following day's guest lecturer, who turned out to be Simon's former girlfriend, Isabelle Lightwood. When Isabelle warned anyone off of flirting with Simon, Beatriz, who had been sitting next to him, inched away in fear.
When Isabelle returned to the Academy with her father, Robert Lightwood, Beatriz was among those bothered by the revelation that the current Inquisitor was, in fact, a member of the Circle. In fact, Beatriz was incredibly disturbed by this that even Isabelle earned her ire, though she politely talked with the latter about mutual acquaintances.
However, when Isabelle suggested that the students do something fun yet dangerous and troublesome, Beatriz was quick to go against the idea and did not join the majority of the other students in their rule-breaking trip for 'fun' with Isabelle. When the others had yet to return by five in the morning, she worried that they had gotten in trouble and immediately went to Simon, asking him for help in finding the others. When Simon refused, saying he knew that Isabelle would not let anything happen to them, Beatriz refused to just trust Isabelle and became furious at him.
Beatriz went on to become a tutor and trainer at the New York Institute, under the new heads Clary Fairchild and Jace Herondale. She had evidently gotten over her crush on Simon and was thrilled when Simon announced his engagement to Isabelle. She also helped Clary throw the pair an impromptu engagement party.
In 2012, she attended the war council meeting called by Julian Blackthorn at the Los Angeles Institute. They joined the procession of Shadowhunters at the parley staged by the Cohort. Beatriz was next to Julie when the latter was killed by an arrow intended for Kieran. Beatriz was devastated and was carried out of the battlefield and into Alicante in tears.
In the weeks after the battle, Beatriz helped set up the new Shadowhunter Academy in New York along with Simon, Marisol Garza, and Luke Garroway. She then attended Alec and Magnus's wedding in Los Angeles. She still wore white, symbolizing that she was mourning Julie's death, along with Marisol, who was also still in mourning over their classmate and Marisol's boyfriend Jon.
Beatriz has brown skin, black hair, and, according to Simon, a warm smile.
Skills and abilities
- Nephilim physiology: Being Nephilim, Beatriz possesses a variety of enhanced physical and mental abilities granted to her by the blood of Raziel in her veins and also by the angelic Marks of the Gray Book. She also has the power to perform tasks unique to their species, such as the ability to use and call on the power of angels for their seraph blades. This includes enhanced strength, agility, stamina, and coordination, which only improves over time and practice.
- Parabatai bond: Previously, due to her parabatai bond with Julie Beauvale, Beatriz was able to call on more strength in battle. The runes drawn on her by Julie also gave a considerably stronger effect.
|“||Julie and Beatriz stood at the same time and looked at each other with a smile. Simon had seen that kind of smile before, that kind of synchronized movement. That was Jace and Alec all over.||”|
–Simon about Julie and Beatriz, The Fiery Trial
After graduating from the Academy, the pair moved to New York.
In 2012, she and Julie attended the war council meeting where she tried to stop Julie from embarrassing herself. They joined the procession of Shadowhunters at the Cohort's parley. When Julie was struck down, Beatriz fell to the ground beside her. She later had to be carried off the battlefield while she sobbed.
A few weeks later, she attended Magnus and Alec's wedding where she wore white, signifying that she was still mourning the loss of her parabatai.
Beatriz had a friendly relationship with Simon. When Simon and George decided to leave the elite group of students and join the mundane students, commonly referred to as "dregs", Beatriz was impressed by them and wanted to remain friends despite it being taboo for the two streams to intermingle. At some point, she developed a crush on Simon, though she later got over it.
After graduating she moved to New York to be the new tutor at the Institute and, as such, kept in touch with Simon. She was very excited for Simon when he announced his engagement to Isabelle and she and Julie helped Clary host the couple's engagement party.
A few months later, she, Simon, Marisol, and Luke worked to set up the new Shadowhunter Academy in New York.
Beatriz was Jon's friend at the Shadowhunter Academy. She, Julie and Jon were usually seen together. Though they were close friends, they did not always agree and Beatriz would reprimanded him when she thought he was out-of-line.
Being a part of the mundane stream did not stop Marisol from challenging and standing up to the Shadowhunter students. Eventually, as the two streams became more friendly with one another, Marisol became a part of Beatriz's group of friends.
In 2012, both Julie and Jon—Marisol's boyfriend—died. Marisol and Beatriz supported one another in their losses. Weeks after the deaths, both of them were still wearing white to signify their mourning period.
Beatriz and George were good friends in the Academy. When George and Simon were transferred to the mundane stream, she continued being friends with them and would sit with them at lunch or in their shared classes.
- Despite being raised a Shadowhunter, Beatriz was not raised in Idris and has some idea about mundane culture; she is aware of 'Brangelina'.
- Beatriz is distantly related to Cristina Rosales. Beatriz's mother is a Mendoza, as was Cristina's father.