Eurofag here so I apologise if terms and processes are slightly different in Canada, but I'd like to provide a picture of what may potentially happen if Chantal has actually made a disclosure. I can't stress enough that I am not a legal professional but do have experience with the legal system and that this is the UK's procedure so it will be different to Canada's, but I'd like to think it'll set the scene for our next saga.
In terms of the general process, if she carries this the whole way through, we're in for a very long and boring legal saga.
She's probably submitted what's known as a "first account" to the police. It doesn't mean there's any case at all, it's just a mandatory procedure the police have to go through when someone makes a disclosure about a potential crime.
Nadar will be told to cease contact with her and she with him for the duration of the investigation, but like that's going to happen, lol. If she fails to do so, it'll likely be thrown out without a second thought.
In the UK, depending on the severity of the claims she has made against Nadar, e.g., broomstick saga, she may be classed as an "intimidated witness," meaning that, if there is enough reason for her to give evidence, it would most likely be done in terms of a video interview and wouldn't be a courtroom procedure, unless the defense made a formal request to the court otherwise. Again, if this did happen, it doesn't mean there's any case at all, this would merely be standard procedure. I can't find anything to say if Canada takes the same approach, but she may be given special measures when it comes to giving evidence.
After that, depending on the viability of the claim, the police will carry out background checks on both Chantal and Nadar, collect any statements from disclosure witnesses, comb through any video evidence, etc. I don't know what effect Nadar's criminal history would have on this so I can't comment on that.
This is an absurdly long process and, in the UK at least, has the potential to take up to a year before being presented to the CPS. Eventually, if the case was deemed to be viable, it'll go to the CPS, who may or may not decide to push the case to court.