Hey, thanks for the kind words! I'm happy you're enjoying the game :)
The purple outfit is actually Jessica's yoga outfit - you can find her doing yoga in the Manor's living room on Saturday mornings.
The kids will always look and act the same, as the system isn't set up to allow for true appearance randomisation. Which is sad on the one hand, but on the other hand it means that if the kids show up in the sequels then their appearances will all be canonical :)