Appearance in the 2006 film based loosely on the Earthsea books: In the 2004 Studio Ghibli film adaptation he is a main character, and destroys Cob himself, reducing him into a souless shadow of his once great power. This omits the final battle between Sparrowhawk (Ged) and Cob. It adds a new side to this otherwise supporting character. Prince Arren has a strong sense of right and wrong, although this is dimmed in the event of implanted rage stealing his heart. Whenever he is prone to this rage, his face shivers and wrinkles, almost as if he is scared of what is about to happen. Being an excellent swordsman, he is a deadly warrior, but is vulnerable when ambushed, a proen when he is captured briefly by Hare and reinforcements while asleep.
He is shown in the film to have a slightly tanned skin and bold, brown eyes, with the classic untidy hair. He is said to have been a lethal swordsman, having obliterated any threat in his path with his sword. It is unclear wheather this is due to the magical power of this sword, or the hidden rage inside him that Cob instilled in him.He is shown to have romantic felings for Tehanu after rescuing her from Hare and his slavers in Hort Town. However, his guilt and Tehanu's initial disrespect for him culiminates in them only being good friends at the end of the film. There is still, however, a deep bond between them of affection, and it is not confirmed whether he meets her again after in the incidents in The Farthest Shore.
In the film adaptation, he is shown to have murdered his father due to a sudden and strange impulse, stealing his pwerful magic-fused sword. He will come to disarm Sparrowhawk under a spell with this, and later will destroy Cob himself.