Bronwyn is the crossbreed daughter of Kim Kil Whan and Pat, who is first seen in a picture in "Ocarina." She appears again in "Wheels", where she demonstrates her proficiency and interest in skateboarding.
Bronwyn has yellow-orange fur, similar to Jake's, with some of it acting as hair that conceals her right eye. She also has her mother's bear nose and snout but her father's eyes and small rainicorn horn, which is shown in "Wheels" to be the main source of her teleportation powers, via lightning.
Bronwyn can be seen as an average teenager, putting up a cool front in front of her like-aged friends, while still being easily embarrassed/frustrated by her grandfather and father. Despite this, she does in fact care for both of them, and takes her father's advice seriously. She had a definite interest in skateboarding, spending much of her time at home drawing board designs, and skating with her friends in the woods.
- In a Twitter post by Steve Wolfhard, Bronwyn's parents tried to keep Jake a secret from her due to his immature behavior.