Jabarkan Guiche dari Daftar karakter The Familiar of Zero

is one of Louise's classmates who, despite being in love with Montmorency, is a vain playboy who often flirts with other women. He comes from a noble family with a deep military history; his father is a general. His wand is in the form of a long stemmed rose, and he specializes in Earth magic, and summoning Valkyries. He likes to dote upon his familiar, a giant mole named Verdandi.

When Saito exposes Guiche's two-timing activities, Guiche is offended and challenges Saito to a duel, only to lose when Saito's runes on his hand activates. As a result, Guiche becomes self-conscious of his fighting abilities and a little cowardly during conflicts, but tries to help his classmates anyway. Guiche and the academy boys join the army for the Albion war; in the light novels, Guiche was placed into a ragtag battalion with low morale. His company was the first one into the City of South Gotha, where he was mortally wounded in battle but then revived by a fairy; Tiffania. In the third anime season, Guiche becomes a captain of the student Undine Knights, and he makes Saito his vice-captain.

His character CD (which he shares with Momorency) was released on 6 September 2006. His F drama CD album with Julio and Saito was released on 21 March 2012.