Mary Hamilton

Mary Hamilton is a medical student at Gotham University, the daughter of Catherine Hamilton-Kane, the step-daughter of Jacob Kane, and the step-sister of Kate Kane.

Early life
Mary Hamilton was born in Gotham City to an unknown father and Catherine Hamilton, the heiress to the Hamilton Dynamics arms fortune.

Over a decade prior to 2018, Jacob Kane and Catherine Hamilton got married, and Mary met her step-sister, Kate Kane.

Growing up, Mary became very active on social media, to the point to be considered sort of an influencer, much to her mother's dismay. She also enrolled to Gotham University as a medical student, saying it was only to found "her future husband" who she wanted to be a rich doctor, however Mary was actually very interest in medicine and secretly became an amazingly proficent student.

Secret clinic
At some point before 2018, Mary started to distribute water and Band-Aids in the poor neighborhood of Bennett Ave then, the situation got her and and, unbeknownst to Gotham University, she used their funds to operate an illegal clinic in said area.

The kidnapping of Sophie Moore
In 2018, she attended the switching of the Bat-Signal with her mother, Catherine. After Sophie Moore was kidnapped at the event, Mary called her step-sister Kate to come home. Mary organized a surprise welcome-home party for Kate, during which Mary talked her head off. Kate asked why she called her, and Mary revealed that she accidentally discovered a box of pictures of her relationship with Sophie, and thought that she would want to be in Gotham for her. Mary was pulled away by her mother to take a photo with a councilwoman. The following day, Mary was working at her clinic when Kate was left on the doorstep. She was brought in and Mary helped stitch up a wound on her arm, when she explained all about the clinic, while also tending to an old man. Later a member of the Wonderland gang was brought into her clinic, and has somehow confessed Sophie's location. The next day, after the city thought that Batman has returned, Mary listened to a child as he described how the Bat flew.

Nearly killed by Alice and getting a new bodyguard
The following day, during breakfast, as her mother spoke about business at the phone, Mary watched a video of a baby turtle eating strawberry and showed it to an annoyed Kate. Then, after Jacob asked Kate if she wanted to reconsider the idea of joining the Crows and she dismissed it again, Mary asked if it was due to Sophie, saying she was shocked that she was now married to a man and asking out loud what was her actual sexual orientation, being cutted out by Kate, who reveal to Jacob her suspicious that Alice was actually Beth, shocking everyone. Later that day, Kate visited Mary's clinic in order to speak with one of Alice's goons she knew was brought there the previous night, and gave him a coded message to deliver to his boss. Then, after the goon was gone, Mary asked Kate if she wanted to have dinner with her, since they hadn't been able to spend time together after she came back. Kate accepted her invitation and they agreed to meet that evening out of the clinic. Mary waited a long time but, at the time of the appointment Kate did not show up (being at a secret meeting at Burnside Park with Alice) however, after a brief blackout in the building, Dodgson appeared and attacked her with the intent of murder her on Alice's orders as she was jealous of her role as Kate's "new sister". Mary managed to defend herself by injuring Dodgson in the leg with a scalpel and locking herself in a closet, then was saved by Batwoman. The following morning Kate visited Mary's clinic in order to apologize, however as she entered, Mary, still traumatized for the previous night pointed a gun to her then, after calming down, she scolded her for having ditched her, explaining the reason why Alice had her attacked, claiming to find it ironic, as she felt Kate didn't consider her a sister at all. Kate replied that it wasn't true but Mary didn't want to listen to her and instead asked her if it was worth it and to let Alice know that "she wasn't a threat", before to walk away in anger.

Personality
Despite coming off as a ditzy socialite, Mary is a kind-hearted woman who will go to any length to help those she loves. Due to the close bond she shares with her step-sister Kate, she's one of the few people who can talk her around. However, Mary also has a bit of an animosity for Kate treating like garbage and seeing her as if she's replacing Kate's biological sister Beth.

Abilities

 * High-level intellect/Skilled tactician/Leader: has proven to be very savvy and intelligent, as well as an highly cunning individual. She is skilled in strategizing and planning, having secretly run her own clinic without getting caught while using founs of Gotham University also covering her activities and intrest in medicine by posing as an irresponsible party girl.
 * Expert physician: As a medical student, Mary had a substantial amount of medical knowledge, enough to operate her own yet illegal clinic. Her medical skills seems to be even greater and more accurate than that of many paramedics.
 * Skilled markswoman: Mary know how to use a gun.
 * Network: As a member of the social elite, Mary has a wide array of contacts.

Equipment

 * Gun: Mary carries a gun so that she can protect herself after being nearly killed by Dodgson.

Trivia

 * Mary loves to watch puppies videos on YouTube.

Behind the scenes

 * In the DC Comics, Mary Elizabeth "Bette" Kane is the original Bat-Girl and served as Batwoman's sidekick and Robin's counterpart. Growing up she would adopt the alias Flamebird (and later Hawkfire) in response to her counterpart's development as Nightwing. In the comics she is Kate Kane's younger cousin instead of her step-sister.