[ unique is a good word for what seven is. she's not completely human, yet not completely borg, either. she's caught in between, her biological systems unable to survive without those borg components that still take up a percentage of her body and vice versa, nanoprobes still alive in her bloodstream. she will never not be borg, and while she may succeed one day at reclaiming her humanity, she'll never be truly human. she is both frustrated and unconcerned with her inability to be what so many people wish she were: not borg.
and a part of her can't help but resent her humanity, to want to be borg again. although in many ways, seven is still that innocent six-year-old girl who was assimilated on the raven eighteen years ago, being borg is really all she's ever known through no fault of her own. she's only been "human" a little over half a year -- not enough time for her to have found (or understand) her place outside of the borg collective. voyager was supposed to be her new collective, but now she is without her captain and the crew she's grown accustomed to and protective of. that is an unsettling, unpleasant experience within itself. ]
Our Wardens have agreed to provide me with an alcove? [ if she hadn't immediately dismissed the welcome message, she would've known that, but arriving in marina on the ion trails of the hirogen taking over voyager and forcing the crew to play out holodeck scenario after holodeck scenario, she immediately believed herself to be trapped in another program, that the hirogen had gone back on their word. it wasn't until later that she realized she wasn't on the holodeck or on board a starship at all.
as for regenerating, she's rigged up a means of doing so by tapping into the dome's systems much like one might plug in a lamp or a toaster, but it doesn't provide her with right amount (or right type for that matter) or energy she needs. it keeps her going, but she slows down much faster. being able to regenerate properly as a borg drone should will alleviate that problem. ]