It was such an element of surprise when Ted was voiced by none other than Akira Ishida, well known today for his role as Gaara of the Desert from Naruto. Kind of unbelievable for Gaara to become Ted, eh?
I found Satoshi Hino's role as Pahn pretty much different from his usual VA roles. And Kenichi Suzumura, of course. He usually voices bad guys or anti-heroes, but as Tir McDohl...
Also, from the Suikoden 2 Radio Drama, Nanami's VA was the same VA as Osaka from Azumanga Daioh. And who could forget Mamiko Noto who voices Apple?
It's not all about knowledge, but it helps.