Nae said
@LunaLate
The cat keeps everything about them. Nothing changes, though their personality and physical stats are no longer visible.
And their biography iirc
I believe that section disappears, but they get a little blurb about their new life and instead of a relationships section they have one called 'Pre-City Contacts'
And you can still view their page if you know the url, their id (so you can put it into a url and/or do [cat=their id] and click that since it'll link you to it), or if they had relationships, you can go to the cat that that they have relationships with and the link to the citied cat will still be there