Gilbert G.P. Guilford (ギルバート G・P ギルフォード, Girubāto G P Girufōdo), 27 years old (28 at R2), is the confidant and personal knight of the second princess of the Britannian Imperial Family, Cornelia li Britannia. He leads the Glaston Knights after Andreas Darlton's disappearance and death. He is voiced by Yoshiyuki Kono (Japanese), Roger C. Smith (English).