This does contain some spoilers, like who dies, so be prepared! And EVERYONE that had a name, including horses and whatnot, are listed here.

The list for order of appearance has only the characters that had an physical part in the story, not the people that were mentioned only in passing (such as Mirianna Ohmsford - Par and Coll's mother). The one that has the characters organized in alphabetical order has all of them.

Addershag: an old and blind seer who mentored Ryer Ord Star and was killed by the Ilse Witch.
Aden Kett: Captain of Black Moclips, he and Rue meet up together when she takes over the ship.
Ahren Elessedil: an Elven prince, he and Ryer search for Walker in Castledown, protected by the magic of the phoenix stone. When Ryer found Walker, he went off to find the missing Elfstones, which he did. He wielded them against the creepers.
Allanon: a shade who was once a Druid; Walker asked him for help before leaving the Four Lands.
Allardon Elessedil: the assassinated king of Arborlon and father of Ahren.
Antrax: technology from the Old World, it had one directive: to protect the knowledge stored in its memory banks. It made Patrinell into a wronk, captured Walker to feed off his magic, and sent creepers and fire threads to kill everyone else not able to defend him/herself. Walker finally destroyed it in the end.
Araden Ohmsford: a scribe, teacher, and Grianne and Bek's father; killed by the Mwellrets that came to their home.
Ard Patrinell: a former Captain of the Home Guard, he was caught by Antrax and made over into what the Rindge called a "wronk". He was made to catch Quentin and the Sword of Leah, but Quentin managed to free him first by killing him.
Bark: the Ohmsfords' dog; it was killed when the Mwellrets came to their home.
Bek Ohmsford: Grianne's younger brother who also controls the wishsong; he wields the Sword of Shannara. He was taken hostage by Grianne but was rescued by Truls Rohk. He was visited by the shape-shifters as well.
Biornlief Ohmsford: a housewife and Grianne and Bek's mother; killed by the Mwellrets that came to their home.
Brin Ohmsford: the first Ohmsford to possess the wishsong. She destroyed the Ildatch.
Coll Ohmsford: Par's brother, he wielded the Sword of Shannara and used it to destroy the magic imprisoned in Southwatch.
Cogline: a once-Druid who lived during the War of the Shadowen.
Coran Leah: Quentin's father.
Cree Bega: Captain of the Mwellrets aboard Black Moclips.
Donell Brae: Black Moclips' pilot, he and Rue meet up together when she takes over the ship.
Furl Hawken: a Rover, he was the helmsman of the Jerle Shannara. A Mwellret killed him.
Galaphile: the first Druid.
Grianne Ohmsford: more commonly known as the Ilse Witch, Walker Boh's enemy; she is Bek Ohmsford's sister and wields the power of the wishsong. She takes Bek hostage, and at the end of the book is confronting Walker with the Sword of Shannara, which she took from Bek.
Hunter Predd: one of the two Wing Riders that made it to Parkasia, he helps Rue take over Black Moclips; his Roc's name is Obsidian.
Jahnon Pakabbon: a Rover aboard the Jerle Shannara.
Jair Ohmsford: Brin's brother, he helped her destroy the Ildatch.
Joad Rish: an Elven Healer whose head was blown off by the fire threads of Antrax while trying to heal a Hunter.
Kael Elessedil: an Elessedil who came to Parkasia thirty years ago and was used by Antrax for energy. He was sent back to the Four Lands to lure others over.
Kelson Riat: a Rover aboard the Jerle Shannara.
Kian: an Elven Hunter.
King of the Silver River: living since the time of Faerie, he gave Bek the phoenix stone.
Kylen Elessedil: the new king of Arborlon.
Liria Leah: Quentin's mother.
Morgawr: a mixed breed between Mwellret and man; he raised the Ilse Witch and taught her how to use the wishsong.
Obatedequist Parsenon: a sub-chief of the Rindge, he found Quentin, Tamis, Panax, and the Elven Hunters and showed them another way into Castledown, where they found the remains of Ard Patrinell.
Panax: a Dwarf who went with Walker to Parkasia; he helps translate the Rindge language.
Par Ohmsford: Coll's brother, he recovered the Sword of Shannara and helped to free the magic imprisoned in Southwatch.
Po Kelles: one of the two Wing Riders that made it to Parkasia; his Roc's name is Niciannon.
Quentin Leah: wielder of the Sword of Leah; the wronk that was Ard Patrinell was hunting him and Tamis for his magic. He later kills it after nearly dying himself.
Redden Alt Mer: the Captain of the Jerle Shannara, he and Spanner spend all of their time repairing the damage done to their airship. He is also known as Big Red.
Rue Meridian: first mate of the Jerle Shannara; she is Redden Alt Mer's younger sister and is also known as Little Red. She manages to take over Black Moclips and sail away with it.
Rustin: an Elven Hunter; he was killed by the fire threads at Castledown.
Ryer Ord Star: a seer who follows Walker everywhere; she was the Ilse Witch's spy and saved the Druid when he was caught by Antrax by using her emphatic powers.
Spanner Frew: the shipwright and builder of the Jerle Shannara.
Tamis: an Elven Tracker who found Castledown, she fled with Quentin from the wronk. She was Ard Patrinell's lover and in the end was killed by what he had become, but only after Quentin freed him first.
Truls Rohk: a shape-shifter who saved Bek from the ruins of his home and from Black Moclips; he revealed himself to the boy, showing his gross combination of human and shape-shifter.
Walker Boh: the last Druid; he seeks to establish a new Druid council and ventures into the bowels of Castledown to find the lost books of magic. Antrax captured him to suck away his magic, but Ryer freed him. After realizing the books were not in a form that he could take home, he glutted Antrax with his magic and destroyed it, but is now nearly dead himself. At the end of the book, he confronts Grianne with the Sword of Shannara.
Word: the creator of life in the Four Lands.
Wren Elessedil: Queen of the Elves during the War of the Shadowen.
Wye: an Elven Hunter; he was killed by the wronk.