Renton is a teenager trapped working as a mechanic in a backwater town. He dreams of joining up with a daredevil group of pilots known as Gekkostate and following in his father's heroic footsteps.<br>
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When a mysterious beauty named Eureka shows up asking for a tune-up, Renton soon finds himself drawn into a high-flying mecha dogfight that makes him a target of the military. When the dust settles on the spectacular battle, Renton is invited to join Gekkostate, but he soon discovers that even a dream come true has a dark side.<br>
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(Source: Funimation)

He is known for playing tough or grouchy men in dubbed anime and video games. His career includes Hotohori in Fushigi Yūgi and Jin in Samurai Champloo. He also played numerous cameos and minor characters in Rurouni Kenshin, in addition to the major character of Hajime Saito. He also does Don Patch in Bobobo-bo Bo-bobo as well as Gabumon and other voices in Digimon.  According to Anime News Network, Thornton has the most credits of any male voice actor and he is second in total voice actor credits only next to Wendee Lee. He has been in nearly two hundred voice-over productions for Japanese animation.  Thornton is also well-known for having played many different minor voice roles throughout the Power Rangers franchise (and similar series such as VR Troopers and Masked Rider).  Thornton has also had experience with ADR direction. Currently, he is co-directing the ADR for the popular anime series Bleach alongside Wendee Lee.


Non-anime roles:  
Bakkasu in "Cosmic Fantasy 1" (VG) (Japanese)  
Gopher in "Kingdom Hearts II" (VG) (Japanese) 
 Xenon in "Poporogue" (VG)  Yoda in "Star Wars" (original trilogy) (Japanese)

Deckard