A videogame character of this name was originally created by Jordan Mechner and has appeared in games subtitled Ghost of the Past and The Shadow and the Flame.
Lloyd Alexander introduced one of these figures named Rhun in The Castle of Llyr, and one named Gwydion appears in the Prydain Chronicles.  Oscar Wilde wrote a story titled for one of these people, which sees a swallow distribute gold leaf from a statue to the poor.  In addition to "The Happy" one of these, one named Rilian is rescued from the clutches of the (*) Lady of the Green Kirtle by Jill Pole and Eustace Scrubb in The Silver Chair.  A videogame character of this name was originally created by Jordan Mechner and has appeared in games subtitled Ghost of the Past and The Shadow and the Flame. Another character of this type meets a Lamplighter, a Geographer, and a Drunkard before crash-landing in the Sahara.  For 10 points, what title is shared by a "little" character created by Antoine de Saint-Exupery and C.S. Lewis's Caspian?
Lloyd Alexander introduced one of these figures named Rhun in The Castle of Llyr, and one named Gwydion appears in the Prydain Chronicles.  
The {Prince} [do not prompt on "king"]