Katherine Asp is the current Secretary of Magical Affairs. Before being appointed to her position, Asp served as the head of the Office of Diplomacy. Asp is highly conservative, and is known for her isolationist policies, keeping America far awar from Lord Voldemort's ambitions. Asp was born in Marble Falls, Minnesota.

Asp's family consists of her seer sister Sophia Asp, niece Jenny Asp, and nephew Luke Matthews. Sophia was murdered by Lucius Malfoy during a suprise attack and Jenny was killed by Malfoy as a sacrifice in a dark spell. Her nephew Luke was an officer in the Office of Special Services until his death at the hands of Lucius Malfoy in Sunnydale, California.