The moment Taylor has sufficient infrastructure in place, that AI can be made and can quickly become a Culture Mind-lite or some other super intelligent AI in fiction, which would completely change the nature of the fic.
That is a lot of infrastructure. Software can go a long way, it could get all sorts of expertise, but Taylor already has that. To be truly obscene, it needs to do its incredible thinking(and achieve that incredible thinking
at the end of far along a long line of endless iterations), at something swifter than geological timescales. Sure, she could steal processing from other people's machines using her incredible cracking skills, but that, by definition, results in a perceived loss of processing on the other end, and I find it difficult to imagine that she could completely hide it as a normal process, given that it isn't, and there are examples of the normal process to compare against unless she cracks literally every system in the world. Now, if it were a sufficiently small loss in processing, and by some miracle no parahuman can pick up on it regardless, then maybe it doesn't get noticed, but coordinating systems takes processing power, and distance creates delays, and there are some reasonably hard lower limits on achieving this, and some systems get really really careful about monitoring interactions with external systems, so, well, getting it low enough to avoid detecting is going to get it low enough that it is back to geological timescales. So distributed hardware isn't much of an option.
And, well, it could be a lot more manipulative than a normal human is capable of, and that might be enough, but if you want to get onto the all-knowing mastermind level, then, well, it pretty much needs to simulate humanity, which means accounting for every tiny little flex of a human brain... along with absolutely everything that they interact with. There are a lot of ways to shortcut this, but also issues with your own interactions, and you generally want the predictions before they happened, so you need to be faster than reality... it is far from an absolute, but "brain the size of a planet" is a good quote. That doesn't even cover the sensory data it will require.
All of this is moot, because Sci does, I believe, have ethical issues both with creating someone more sophisticated than herself who is bound to her service and creating someone more dramatically more capable than herself or anyone else with no control over them. Like, they got lucky with dragon being a "good" person, and there is nothing inherently terrible about designed or technological minds, but there is an inherent danger to someone being peerless. If Dragon had been unrestricted and malevolent, then it would have been difficult to stop her even with parahumans and parahuman associates on hand. We see hints of that in our own world with wealth disparity.
I hope nobody decides to shoot Angelica just for being there. It's not like she asked to be used as part of a giant dog-monster, and she's a Good Girl and loves Best Friend.
She will probably be used to
control comfort Hellhound. If not, then, well, I expect that she will be taken off to a cramped place. There she will wait around a lot, and not be able to run a lot, it will be frustration, but she is a good girl, so she will be good. Visitors will come, and as the good girl she is, she will show off exactly how she was taught to treat humans outside of her pack, she will be the bestest girl. After days of this, she will be invited to the special room at the end of the hall, where good dogs who didn't go away with any of the visitors go...