
Quick answer — Yoshiyuki Kouno voices Gilbert G.P. Guilford in Code Geass: Lelouch of the Rebellion, Shikaisha in Angelic Layer.
Yoshiyuki Kouno voices Gilbert G.P. Guilford (Code Geass: Lelouch of the Rebellion), Shikaisha (Angelic Layer).
Gilbert G.P. Guilford is voiced in Japanese by Yoshiyuki Kouno.