Nobody is really sure how Brooke's become the social butterfly that she is, given her family history - her energy and need for socialization have branded her as the odd duck of the Outerbridge family, a label she wears with pride and conviction. She is the type to know everyone in town at least indirectly, and can quickly recognize people without having met them before based on word of mouth comments - with astonishing accuracy, too.
She's the type to jump in head first and ask questions later, and that sort of brave (or fearless?) behavior has gotten her into trouble before, although she seems to be mature enough to know when to stop. This halting usually comes when she realizes her fooling around is endangering herself or others.
From a young age she's learned how to be independent and self-sufficient, and she rarely hesitates to get her hands dirty when the situation calls for it, even coming up with creative and unorthodox solutions to various problems. However, she is also of the school of thought of 'if it ain't broke, don't fix it' - this sometimes leads to complacency and to have her problems grow and spiral out of control before she even realizes there are any problems to take care of.
Once Brooke sets her mind to something, regardless of what it may be, not only is it borderline impossible to change her mind, but she ferociously pursues that goal until it's achieved. Unfortunately, this tenacity hasn't been something she's enacted to tackle Quidditch or her school grades, in which her performance remains average at best as a result - one could easily make the argument that her priorities are switched.
She's an optimistic and cheerful individual whom greets others, be them strangers or friends, with an upbeat attitude and encouraging grin. Unless the situation calls for some sort of seriousness, it's hard to bring her down from that general behavior. Her bubbliness usually has a twisted sense of humor sprinkled it to it, ranging from silly and cheeky to sarcastic and morbid and anything in between. Despite her friendly disposition she's quite blunt about her opinions and has no qualms flirting with someone she finds attractive, but doesn't go overboard with it.
Her positive mood switches when she's alone - in the rare circumstance that she has no contact with others for any given reason, she becomes somewhat anxious. She needs some sort of connection at all times, even if she's doing some sort of solitary indoor activity: even if it's just regularly petting her dog, or texting back and forth with a friend. It's very much a drug to her and she actively recognizes it as such even if not admitting it openly.
Her lack of life experience has led her to become naive and a bit too trusting of others. While she still hides behind the shield of common sense, her naivete makes her a good target for emotional manipulation, or worse.
She lacks a sense of personal shame and exudes confidence in her words and actions, all of which is reflected as an odd type of charisma. While not abundant, it does its job when needed and she's never had much trouble making friends with the roughest of people. Unfortunately, her confidence walks the fine line with arrogance and occasionally crosses it. She might unconsciously reach sadistic levels as well, depending on what sort of joke or gag she pulls on people to test out their reactions.