Continuing with the trend!
Before the change in setting, Vivi had an angel meld with her, hence giving her wings and light abilities. So as a way to fit that in a new setting, her angel became an antivirus-like entity, fending off any attempts at hacking or compromising her body and mind. It does a little more though, giving her advice and what not.
Not that she actually listens to it most of the time, but, yknow.