Jiro is the owner of the shadow Minotaur, who uses white magic in the game. In the anime, Minotaur is always chiding Jiro for overusing his energy in battle but generally takes a calm approach to opponents.    from wikipedia

As Shu's village was being attacked by an unknown enemy, he and his friends, Jiro and Kluke decide to defend their home. They soon meet warrior Zola and receive the powers of Shadow, an ability that let's them transform their shadow into a powerful monster. Shu receives one of the most powerful monsters, Blue Dragon, and they all set out to defeat their enemy.
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(Source: Anime News Network)

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.

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