If you still have the Novice's Relocation item, you can change your home Kingdom by following the steps below:
1- Open the Kingdom Map (Kingdom button at the bottom of the screen in town view);
2- Open the World Map (Small icon with Towers/Castle);
3- Enter the number of the Kingdom your friends are located (Graufsvalts is the 147th Kingdom);
4- Select the Kingdom you want to move to;
5- Tap "Go to" from the "Kingdom Info" window that pops up;
6- Tap on an empty suitable location to move your Town.