
Quick answer — Yuutaro Honjou voices Kenji Seki in Psychic School Wars, Ao Fukai in Eureka Seven AO, Yango in Xam'd: Lost Memories and 2 more characters.
Yuutaro Honjou voices Kenji Seki (Psychic School Wars), Ao Fukai (Eureka Seven AO), Yango (Xam'd: Lost Memories), Ken (Love You Baby), Gible Wisdan (Akashic Records of Bastard Magic Instructor).
Kenji Seki is voiced in Japanese by Yuutaro Honjou.