Roffe is a Sildroher prince.
Roffe first appears at a party for himself by his father and begins a friendship with Ulla and Signy.
During the summer, he travels to the mortal world with his brothers, Signy, and Ulla for three months. On the last night of the trip, Roffe uses Ulla's knife on an innocent ten-year-old to produce fire in water, rendering Ulla unable to return back to the sea.
Afterward, he marries Signy, Ulla's former friend, and establishes the Sildroher Kingdom in a different area of the sea.
Roffe is the Swedish diminutive of the name Rolf, a contracted form of the name Rudolf.