Northern tickets may be used at no additional cost on board Transport for Wales services between Manchester Piccadilly - Chester (in both directions) all day. Customers can connect from Manchester Victoria - Manchester Piccadilly using the Transport for Greater Manchester Free Bus service. Please see station staff or information posters for the location of the bus pick up point for this service.
It is still possible to get from Victoria to Piccadilly on the Metrolink tram system just now by first travelling via Exchange Square and then changing trams at St. Peter's Square. Hopefully, the OP's partner will have negotiated Manchester City Centre by now, however, and be well on their way to Chester (and may even have already arrived).Mind that the roads around Shudehill are dug up and there's no tram service so it might be faster having a walk.