Kenichi Suzumura (鈴村健一) has been confirmed as the voice of Tir McDohl (the name Tir has also been confirmed to be the name used by the hero in the radio drama).

Suzumura is probably best known as the Japanese VA or seiyu, if you want to get all 'anime' on it, of Zack Fair in Final Fantasy VII: Crisis Core for the PlayStation Portable. In other video game work, he has also provided the voice of Leo Stenbuck in Zone of the Enders:The Second Runner and Gippal in Final Fantasy X-2. In 2008, he won the "Best Radio Personality" award at the second Seiyu Awards. His debut was in the anime Macross 7.

Other VA's confirmed to participate, although their parts have not been revealed, include Takehito Koyasu (子安武人), the Japanese seiyu of Shingo Yabuki in the King of Fighters series, Seifer Almasy in Kingdom Hearts II and Lezard Valeth in the recent Valkyrie Profile games among many others. One of Japan's more prolific voice actors, his deep, smooth voice often ear-marks him for characters with are either villains or lonely bishōnen.

Also confirmed is Nakamura Yuichi (中村悠一) most notably known for the roles of Graham Aker in Gundam 00, Tomoya Okazaki in Clannad, and Rufus in Valkyrie Profile 2: Silmeria.

Konishi Katsuyuki (小西克幸), meanwhile, is probably most known as the Japanese VA of Lloyd Irving in the Tales of Symphonia series of games and Toshiie Maeda in Samurai Warriors 2 Extreme Legends. He is also the seiyu for Assassin's Creed's Altaïr and in anime, his most promement role is probably that of Demon Eyes Kyo in Samurai Deeper Kyo.

Finally, Hisashi Oda (小田 久史), possibly the least known of the voice actors revealed to us so far, is noted for roles in TV anime in Bleach (as Menice), Mouse and Digimon Savers as Wakasugi Swan.

At least three more names are likely to be revealed and, of course, it would be surprising and confusing if at least one of them was not a woman. Due Fiumi will keep you updated as more information is revealed.