Assuming she is arriving in YYZ on the domestic leg of this flight from YVR, she will retrieve her bags at the domestic baggage carousel, not international. Although this baggage claim area appears to be hidden behind secure doors, this is not a secure area. They merely attempt to prevent those greeting arrivals from crowding the carousel area. However, if you take the escalator up to the connecting level (between arrivals and departures), you will find to the left of the security line that you can meet the arriving passengers just as they leave the secure gate area, and then join them for an escalator ride down to the baggage carousels. We do this all the time. As well, we often find abandoned luggage carts just before the connecting passenger security checkpoints, and then bring them down with us to the carousels on the elevator - save $2.