Editing Princess Eilonwy (section)

===Post-''Book of Three''===
After the events in ''The Book of Three'', Eilonwy comes to live at [[Caer Dallben]], home of [[Dallben]] the enchanter and Taran. She accompanies Taran on many of his later adventures, and her courage and determination never falter. We later discover that she is the last living descendant of Llyr Half-Speech, the Sea King, which is why Achren abducted the girl as a small child. She is the only one capable of reading a tome that requires the light of her bauble, which only Eilonwy can cause to light. Because her magical tutoring under Queen Achren was incomplete, her ability to perform magic is severely hindered, though she retains and displays certain inborn abilities throughout the series.

Physically, Eilonwy is described as blue-eyed, with red-gold hair (though the film ''[[The Black Cauldron (film)|The Black Cauldron]]'' depicts her as a blonde). She has a good heart, but is very determined to have her own way and quarrels frequently with Taran, although the quarrels do not last long. She is never without her "bauble"—a magical ball that she can make give off light, which sometimes shows things not visible under ordinary lights.

''[[The Castle of Llyr]]'', the third novel in the series, reveals that this is really the [[Golden Pelydryn]], a magical artifact passed through Eilonwy's family from mother to daughter. The events of that book bring Eilonwy back to her ancestral home, [[Caer Colur]], and give her a greater sense of her ancestry. The Disney film depicts the bauble as a semi-sentient object that floats through the air under its own power, but in the books, it is described more like an orb of gold that must be carried.