Mieu is a blue Cheagle. Cheagles are considered holy by the Order of Lorelei due to a pact formed with Yulia, symbolized by the Sorcerer's Ring. The Sorcerer's Ring enables Cheagles to communicate with other creatures and humans, as well as use the power of various Fonons to gain new skills (like flight by flapping their ears). He joins Luke's group when the elder Cheagle bans him for one cycle of the seasons for setting fire to the forest in which the Ligers live, which caused the ligers to hunt the Cheagles for food. Mieu quickly grows fond of Luke, referring to him as "Master," and naively accepting the name, "Thing". Though Luke originally abuses and ridicules Mieu with little provocation, he eventually comes to regret his actions. Mieu, however, thought of Luke's actions as mere play and affection, thanking Luke for his "name". He ends most of his sentences with "desu no."  (Source: Wikipedia)

Luke fon Fabre, the spoiled son of a noble from the kingdom of Kimlasca-Lavaldear, has been confined inside his father's mansion ever since he was kidnapped seven years ago by a rival country, the Malkuth Empire. Now Luke's memory of the life he led before is missing, and a strange voice, which only he can hear, has been calling out to him ever since. One day while training with his mentor, Van Grants, a strange woman called Tear breaks into the mansion with the sole intent of taking Van's life. During the struggle Luke is transported far from home, along with Tear, and now that Luke has finally gained the freedom he's been dreaming of, what awaits him in the outside world will shatter everything he's ever known about himself.
 
(Source: Anime News Network)

Miki Maruyama is a freelance Japanese voice actress. In her third year of junior high school, she was chosen to play the role of Uran in a public audition for Astro Boy (2003), and made her voice acting debut.

[Website](http://maruyamamiki.com)

Fonons. Essential components of all matter on planet Auldrant. 
Ages ago, a new type of fonon was discovered&mdash;the Seventh Fonon. Its discovery threw humanity into chaos, for if one could use the Seventh Fonon, one could learn the future. Wars over the Seventh Fonon raged across the lands, ending only when the miasma&mdash;a poison from within the planet&mdash;covered the entire world. This is when Yulia appeared. 
A fonist skilled in prophecy, Yulia saw thousands of years into the future and foresaw a way to seal away the miasma. With the guidance of her prophecies, humanity sealed the miasma deep within the planet. 
Over two thousand years passed. 
The world is ruled by Yulia's prophecy, known as the Score. People believe in the coming &ldquo;unprecedented prosperity&rdquo; promised in the Score, never straying from the path set forth in the Score which will lead them to that prosperity. They look to the Score as revealed by the Order of Lorelei, the religion Yulia founded, and hold that the greatest virtue is to follow the Score faithfully. 
Yulia's Score tells of a young man who is necessary in order to bring &ldquo;unprecedented prosperity.&rdquo; His name is Luke fon Fabre. An heir to the throne of the Kingdom of Kimlasca-Lanvaldear, he was kidnapped as a child by the kingdom's enemy, the Malkuth Empire. Since his return he has been confined to his family's manor for his own safety. He has no idea of the evil that now draws close.

A Tales of the Abyss side story that focuses on Jade Curtiss, also known as Jade the Necromancer. 

Two short "skit-type" anime: 
Episode 1: "Meii Jade? (Great Doctor Jade?)" 
Episode 2: "Goshujin-sama to Maid (Master and Maid)"