A talking skeleton gets angry if you dump your wife for a political marriage to a dwarf princess.
He's the Undead Councilor, and he's quite conservative. Before going off to battle, there's some role-playing to do. You can visit rooms in your palace to talk to advisers such as the rude skull man above, your wife, and sometimes foreign diplomats -- like the dwarven fellow who used his daughter as a bargaining chip. The dialog options you choose will change their attitude toward you, and unlock cards to use in battle and for overall strategic boosts.