Emma is under arrest for the assault she committed on video. She can probably get bailed out, but there will likely be consequences and a follow up investigation. Given the evidence on the video and Taylor (or at least her father) sharing the details of her journal with the police they're probably going to be digging into her past behavior. If they can get a warrant for her cell phone (fairly easy, considering how driven the police are) they'll be able to confirm the entries in Taylor's journal. That could lead to a whole host of new charges.
Sophia isn't on the hook for anything at the moment, but assuming Taylor shares reports of the abuse she's suffered it's likely she'll be included in the investigation as well. She will also need to deal with the Youth Guard and her case Agent needing to cover for the fact that they were covering for her. There are a lot of things that could catch up with her.
Piggot has the police force gunning for her. This is mostly over her handling of the ABB attacks, since a lot of police were caught in the second wave of bombings while Piggot failed to share the warning she received from Apeiron. Taylor's case is really just a stick they can use to beat her, so they're going after it as hard as possible. Successful investigation into the current assault could let them reopen aspects of the Locker case, including dragging out the PRT's lack of action on the matter. It's also fairly likely that Piggot is going to figure out Taylor's identity from her hospital records, which (considering Apeiron's stance on the unwritten rules) is equivalent to finding an armed nuclear device. That will be a very, very bad day for her, and one that is probably fast approaching.