I am nominally ready, at least for some RP- it will be a few days before I can get the character sheet polished and completely posted.
Should be effective enough- I moved most of her 'offense' to a device, and between that and the trip/feint/set-up stuff, she ought to be effective (if not in pure damage terms).
In terms of relevant background, Bella is from southern California (San Angeles), and is a freshman at Pine Oak Technical (where she might know Silver Streak, and least in civilian IDs). She is fascinated by metahumans, but also has an interest in folklore and mythology (perhaps she has run into Galatea's civilian ID at an exhibit of relevant artwork (Statuary related to the Hindu gods or something).
She would also have taken the public tour of Centurions Tower (and relevant downtown sites/exhibits); I was even toying with the idea of her having a part time job (tour guide or receptionist, likely) at the Tower- she would also have done at least some testing to see how good the anti-teleport screens are. She probably spends at least some of her free time at Atlas Dedication Park, musing on the responsibilities that come with having superpowers.
Bella started displaying powers at a very early age, and was a 'kid sidekick' for a while to the California-based techno-wizard known as Mercurio. She only appeared at charity functions and staged appearances, not in the field, over about two years and ending ten years ago (Age 6 through 8 for her). Mercurio has since retires, but still keeps track of things and tinkers a bit- Bella will have him as a Contact, and he is responsible for building her Portal Glove (not so secretly, he hopes she actually starts a hero career, instead of just STUDYING about heroes).